Targeting the Convoys

The Kanalkampf (Channel Fight) was the German term for the Luftwaffe's air operations over the English Channel against the British Royal Air Force (RAF) in July 1940.

During the Second World War, air operations over the Channel launched the Battle of Britain.

The Allies had been defeated in Western Europe and Scandinavia by the 25th of June.

Adolf Hitler issued Directive 16 to the Wehrmacht (German armed forces) on July 16, ordering preparations for an invasion of Britain under the codename Unternehmen Seelöwe (Operation Sea Lion).

A landing exercise wWith the "Führerweisung" No. 16 of 16. In July 1940, the Wehrmacht began intensive preparations for the company "Sea lion". On the sandy beaches of Sylt or the French Channel Coast (picture), German soldiers rehearsed the invasion of England. In this case, a landing raft consisting of several boats served as a floating transport for the field hit. On 16 July 1940, Hitler issued Directive 16, formally authorising preparations for Operation Seelöwe, the planned German invasion of Britain. The directive outlined a cross-Channel assault designed to secure a decisive victory, contingent upon achieving air and naval superiority. Responsibility fell upon the Kriegsmarine and Luftwaffe to neutralise the Royal Navy and cripple Fighter Command. While meticulous in its ambition, the directive underestimated Britain’s resilience and the logistical complexities of an amphibious invasion, leaving Seelöwe fatally compromised from inception.

https://www.spiegel.de/geschichte/hitlers-unternehmen-seeloewe-die-invasion-die-nie-stattfand-a-986303.html#fotostrecke-e3ad7229-0001-0002-0000-000000118006

...Hitler stood at a crossroads....

Prelude

In the days following the French surrender in June 1940, Adolf Hitler stood at a crossroads.

With mainland Europe under his control, Britain remained defiant.

On 2 July, he concluded that the island could not be invaded until the Luftwaffe had secured air superiority.

The Kriegsmarine was too weak to challenge the Royal Navy alone, so the skies would have to be cleared of the RAF before Operation Sea Lion—the planned invasion of Britain—could proceed.

By 12 July, Hitler clarified his thinking: German air power would be the shield and sword of the invasion.

A directive followed on 16 July, outlining clear objectives for the Luftwaffe—defend the invasion fleet from air attacks, destroy British coastal defences, and crush any resistance by the British Army.

But a full-scale assault on the RAF was still weeks away.

German 'Fuhrer' Adolf Hitler. After France’s fall in June 1940, Hitler planned Britain’s invasion, requiring Luftwaffe air superiority to counter the Royal Navy. By mid-July, he ordered German air power to shield, strike, and weaken British defences.

https://www.reddit.com/r/HistoryPorn/comments/19vu7r/a_rare_color_photo_of_adolf_hitler_which_shows/

By mid-1940, Nazi Germany dominated Western and Central Europe. France had fallen in June, joining a long list of occupied nations including Poland, Norway, Denmark, Belgium, and the Netherlands. German troops and administrators enforced control, exploiting resources and suppressing resistance. In Vichy France, a collaborationist regime emerged, while occupied territories endured rationing, propaganda, and political repression. Across the continent, Britain now stood alone in defiance, its survival dependent on resisting Germany’s next move—the coming air assault.

https://pages.stolaf.edu/wwiipp/sample-page/

...infrastructure across France and Belgium had been devastated...

In the meantime, the Luftwaffe undertook its third major redeployment in just two months.

After first surging into the Low Countries and then southern France, German Air Fleets now moved into northern France and Belgium, positioning themselves along the English Channel.

This expansion was not smooth.

The infrastructure across France and Belgium had been devastated by the recent fighting. Railways, roads, bridges, and airfields were in disrepair.

The German Army was tasked with rebuilding bridges to supply forward bases, while the Luftwaffe took over abandoned Allied airfields, many of which lacked even the basics—electricity, running water, or suitable runways.

A German soldier looks over a destroyed French city during the Battle for France in 1940. The German invasion of France in 1940 left vast swathes of the nation’s infrastructure shattered. Retreating French forces and advancing Germans alike destroyed bridges, rail lines, and key transport hubs to hinder movement. Cities and towns along the front suffered heavy bombing, damaging roads, ports, and factories. Railways were torn up or rendered unusable, while airfields lay cratered and abandoned. This widespread destruction crippled France’s logistics, complicating both civilian recovery and the German military’s own post-conquest redeployment.

https://warfarehistorynetwork.com/article/the-battle-of-france-furor-teutonicus-gallic-debacle/

...shortages plagued frontline units...

Logistics became a nightmare. The Luftwaffe’s supply lines, already strained, began to buckle.

On the 8th July, only 20 of 84 railway tankers carrying aviation fuel reached the critical supply depot at Le Mans.

Fuel shortages plagued frontline units, and the Transportgruppen—tasked with keeping the Luftwaffe running—could barely supply their own squadrons.

Replacements and reinforcements were trickling in through Ergänzungsverbände (supplemental formations), but not quickly enough to restore full operational strength.

Messerschmitt Bf 109E1 1./Jagdgeschwader 51 'White 9' force landed France 1940. During the Battle of France (May–June 1940), the Luftwaffe secured air superiority but suffered significant attrition. German records indicate around 1,300 aircraft lost, including bombers, fighters, and reconnaissance planes, while hundreds more were damaged. Many veteran crews were killed or captured, weakening Germany’s long-term operational strength. Though the Luftwaffe supported the rapid Blitzkrieg effectively, these losses—especially among trained pilots—would strain resources and contribute to mounting difficulties during the subsequent Battle of Britain.

https://www.facebook.com/colourbyRJM

...momentum of conquest was slowed by complacency...

And while ground crews and junior officers struggled to prepare for the next phase, many of the senior Luftwaffe staff were enjoying the luxuries of victory.

Paris had fallen, and with it came celebration, promotions, and parades.

Hermann Göring, elevated to Reichsmarschall, basked in glory while vital preparations stagnated.

The momentum of conquest was slowed by complacency.

Nevertheless, the Luftwaffe slowly gathered its strength. As preparations limped forward, German aircraft began probing British defences across the Channel.

Reichsmarschall of the Luftwaffe, Hermann Göring.

https://nl.wikipedia.org/wiki/Hermann_G%C3%B6ring

Luftwaffe personal checking an Messerschmitt 109 fighter. Preparing for Kanalkampf placed enormous strain on Luftwaffe maintenance crews. Aircraft operating from hastily adapted French and Belgian airfields faced salt corrosion from Channel air, heavy dust from summer conditions, and constant wear from high sortie rates. Spare parts were often in short supply, forcing cannibalisation of damaged machines to keep others flying. Mechanics worked around the clock under pressure, yet maintaining serviceability across bombers and fighters proved a constant challenge, limiting operational strength during sustained convoy attacks.

https://www.youtube.com/watch?v=9FWnauKjhUU

...a bloody and costly prelude...

This phase, known as the Kanalkampf (Channel Battle), involved repeated attacks on merchant convoys and occasional dogfights with RAF fighters.

These skirmishes were intended to lure the RAF into combat, weaken their forces, and test Britain's resolve. It was a bloody and costly prelude, but not yet the full fury of the Battle of Britain.

It would take forty long days after France’s fall before the Luftwaffe was ready to launch its main offensive.

The Kanalkampf marked the opening notes of an aerial symphony of war—a warning of the storm that was about to break over southern England.


German Preparations

In the summer of 1940, as the smoke of war settled over conquered France, the Luftwaffe turned its gaze toward Britain.

Yet, despite its triumphs on the continent, Germany’s mighty air force held back from unleashing its full fury on British soil.

This hesitation was rooted in the German principle of Schwerpunktprinzip - the concentration of overwhelming force at the decisive point.

Diversion of effort was discouraged, and as such, the Luftwaffe refrained from full-scale operations against Britain until after the French armistice on 22 June.

Adolf Hitler and German Officers at the signing of the Armistice after the French surrender. On 22 June 1940, France signed an armistice with Germany in the same railway carriage at Compiègne where Germany had surrendered in 1918—a deliberate humiliation engineered by Hitler. The agreement divided France into an occupied zone under German control and a nominally independent Vichy regime. While fighting briefly continued overseas, the armistice marked the collapse of French resistance on the mainland and gave Germany free rein to focus on Britain as the next target of conquest.

https://war-documentary.info/armistice-memorial-compiegne/

...initiated more deliberate steps toward neutralising the island nation...

1940 Map showing the location of RAF Fighter Command groups and Luftlotte's 2 & 3 - now located in France and Belgium and within range of the UK.

https://www.ibiblio.org/hyperwar/AAF/AAF-Luftwaffe/AAF-Luftwaffe-2.html

Still, German bomber crews began testing British defences even earlier.

Flying by night, they conducted limited sorties in May and June, more probing than punishing.

When Britain defied Hitler’s overtures for peace, the Luftwaffe initiated more deliberate steps toward neutralising the island nation.

Luftflotte 2 and Luftflotte 3 were redeployed to airfields in France and Belgium, putting them in striking range of southern England.

In June and July, German bombers carried out scattered night raids on coastal towns and inland targets—airfields, factories, and ports—designed to fray nerves and lower morale.

Their impact, however, was minimal and erratic, leaving British intelligence unclear about German intentions.

Luftwaffe air crews study maps in the summer of 1940. In the background is a Dornier Do 17 light bomber.  Luftwaffe officers meticulously refined their plans for Kanalkampf, the battle of the Channel. Emphasising disruption of British coastal convoys, commanders such as Kesselring and Sperrle coordinated bomber, fighter, and E-boat operations to choke Britain’s supply lines. Reconnaissance units tracked shipping movements with increasing accuracy, while fighter groups prepared to lure the RAF into battle. These operations were seen not merely as harassment but as a calculated prelude to Adlerangriff, the decisive assault on Fighter Command.

Bundesarchiv, Bild 101I-341-0481-39A / Spieth / CC-BY-SA 3.0.  https://battleofbritain1940.com/entry/wednesday-7-august-1940/

...the raids proved costly...

These night raids did, however, offer valuable experience.

German crews honed their use of navigational tools like the Knickebein system - radio beams that enabled aircraft to fix their position and locate targets with surprising accuracy.

On the night of 6/7 June, a Luftwaffe bomb fell on Addington in Greater London, a harbinger of what was to come.

But the raids proved costly; German bombers flying low were easily illuminated by searchlights and picked off by anti-aircraft fire.

By late June, they were forced to operate at higher altitudes, sacrificing accuracy to preserve aircraft.

...had no desire to cooperate with the Kriegsmarine...

Commander of the Kriegsmarine Großadmiral Erich Raeder who clashed with Hermann Göring, commander of the Luftwaffe.

https://commons.wikimedia.org/wiki/File:Bundesarchiv_Bild_146-1987-080-30A,_Erich_Raeder_Recolored.jpg

One area of strategic discord lay in Germany’s approach to maritime targets. Reichsmarschall Hermann Göring, commander of the Luftwaffe, had little interest in naval warfare.

He viewed such operations as beneath his elite air force and had no desire to cooperate with the Kriegsmarine or its commander, Großadmiral Erich Raeder - whom Göring despised as a relic of the bourgeois class that Nazism had vowed to dismantle.

When the High Command of the Wehrmacht initiated a naval blockade against Britain on 18 July, Göring refused to support it in any meaningful way.

He consistently sidelined Luftwaffe efforts to disrupt British shipping, insisting that air power should be reserved for military and strategic targets.

Not until February 1941 would this policy begin to shift.

...control the skies, and Britain might be forced to the negotiating table...

Instead, Göring remained fixated on a decisive air battle. In his directive of 30 June, he made it clear: the destruction of the RAF was the priority.

His belief was simple - control the skies, and Britain might be forced to the negotiating table.

At a high-level conference in Berlin on 31 July, Hitler presented the outline for Operation Sea Lion, the planned invasion of Britain.

Tellingly, no Luftwaffe representatives were present. Göring, absorbed in internal debates over which targets to prioritise, ignored repeated summonses to these inter-service meetings.

...the unforgiving waters of the Channel...

Meanwhile, Luftwaffe commanders Hugo Sperrle and Albert Kesselring, tired of waiting for clear direction, began targeting British coastal shipping.

The logic was sound.

These targets were easier to locate than inland airfields or infrastructure, and striking at supply convoys could force the RAF into battle on terms that favoured the Germans.

Fighter Command would have to respond, and in doing so, expose its aircraft and pilots to combat over the unforgiving waters of the Channel.

Downed RAF pilots were far less likely to survive ditching at sea—Britain had no formal air-sea rescue service—while the Luftwaffe had developed one of its own.

The Luftwaffe was much better prepared for the task of air-sea rescue than the RAF, specifically tasking the Seenotdienst unit, equipped with about 30 Heinkel He 59 floatplanes, with picking up downed aircrew from the North Sea, English Channel and the Dover Straits. In addition, Luftwaffe aircraft were equipped with life rafts and the aircrew were provided with sachets of a chemical called fluorescein which, on reacting with water, created a large, easy-to-see, bright green patch. In accordance with the Geneva Convention, the He 59s were unarmed and painted white with civilian registration markings and red crosses. Nevertheless, RAF aircraft attacked these aircraft, as some were escorted by Bf 109s.

https://www.facebook.com/War1982

...place further strain on British logistics...

Moreover, closing the English Channel would sever a vital artery supplying the British war effort via the Thames Estuary.

Though convoys could be rerouted around Scotland, this would slow the flow of goods and place further strain on British logistics.

RAF chief Sir Hugh Dowding recognised the danger and requested that the navy divert shipping away from the most contested waters to reduce pressure on his fighter squadrons.

The Luftwaffe’s operations quickly developed a dual purpose: block British sea routes and lure Fighter Command into combat.

By July’s end, Luftflotte 2 and 3 had reached full strength—1,200 medium bombers, 280 dive-bombers, over 980 fighters, and nearly 140 reconnaissance aircraft, stretching from Hamburg to Brest.

Air Chief Marshal Sir Hugh Dowding, Commander-in-Chief of RAF Fighter Command.

https://bentleypriorymuseum.org.uk/et-custom-timeline/acm-sir-hughd-dowding/

...limiting the number of fighters available to protect the south...

Meanwhile, Luftflotte 5 in Norway, though smaller, played a strategic role by compelling the RAF to retain a defensive presence in the north, limiting the number of fighters available to protect the south.

Thus began the Kanalkampf - the battle for the Channel - a prelude to the greater air war soon to rage across Britain’s skies.

It was a calculated move to test British resolve, probe defences, and draw blood. While the full-scale assault was still to come, the storm was already gathering.


Britain Braces Itself

By 1940, the uneasy alliance between Britain’s military services remained brittle, strained by decades of rivalry.

Ever since the Royal Air Force was founded on 1 April 1918, it had fought not only its external enemies but also a turf war with the Admiralty and the War Office.

In the interwar years, the Army and Navy repeatedly tried to disband the RAF, eager to reclaim control of air power.

Though the bitterest infighting had eased by the Second World War—especially after the Fleet Air Arm returned to naval control—distrust lingered.

The Air Ministry, in particular, remained wary of the Army’s ambitions.

Sopwith 7F.1 Snipe E8015, Lieutenant Edward Mulcair of 'A' Flight, No. 43 Squadron RAF, ready for a patrol over the German lines. France, October 1918. The RAF, formed in April 1918, faced significant challenges during the interwar years. Rapid postwar demobilisation left it severely weakened, while budget cuts under the “Ten Year Rule” restricted expansion and modernization. Political debates questioned the RAF’s independence, with the Army and Navy seeking control of air power. Despite these obstacles, the service pioneered strategic bombing theories, developed new fighter designs, and established the world’s first integrated air defense system, laying crucial groundwork for 1939.

https://www.facebook.com/ww1incolour

...mistrust flared into dysfunction...

That mistrust flared into dysfunction during the Battle of Dunkirk. RAF Fighter Command flew intense missions over the beaches to protect the evacuation of the British Expeditionary Force, but losses mounted quickly.

By the 1st June 1940, the RAF had scaled back its cover to conserve its dwindling fighter strength.

In the air force’s absence, German attacks sank a minesweeper, a transport vessel, and three destroyers, with two more badly damaged.

The Royal Navy, bearing the brunt of those losses, grew increasingly frustrated with the RAF’s approach.

On the 15th August 1940 Pilot Officer Richard Hardy's Spitfire mk.1a was damaged in combat and he was forced to land near Cherbourg where it fell into German hands. This image shows the aircraft just after German markings were applied. During the Battle for France (May–June 1940), RAF fighter squadrons deployed in support of the British Expeditionary Force suffered heavy losses. Operating Hurricanes and a small number of Spitfires, they faced overwhelming numbers of experienced Luftwaffe pilots. In just six weeks, over 400 fighters were destroyed, many during desperate rearguard actions covering retreating Allied forces and the Dunkirk evacuation. Despite the losses, RAF pilots gained invaluable combat experience that proved critical during the forthcoming Battle of Britain.

https://www.reddit.com/r/wwiipics/comments/111ze8e/german_personnel_inspect_the_first_ever_raf/

...had overestimated kills...

Exaggerated claims didn’t help.

The RAF believed it had performed superbly, asserting it had shot down far more German aircraft than it had.

In reality, it had overestimated kills by a factor of four.

Of the 156 German aircraft lost during the campaign, only 102 could realistically be attributed to the RAF—compared with 106 British aircraft lost.

Around 35 enemy planes had fallen to naval gunners. RAF leaders, however, remained convinced of their own effectiveness, while operational cooperation with the Navy remained minimal.

Pilots of 615 Squadron RAF wait for the order to scramble at Abbeville airfield, Buigny-Saint-Maclou, France, April/May 1940. Sitting (left to right); Flying Officer Brian P Young, Flying Officer John R Gayner, Pilot Officer Tom C Jackson and Flying Officer Levin E Fredman: standing (left to right); unknown, Flying Officer Peter Collard and Flight Lieutenant James G Sanders. During the Battle for France in 1940, RAF Fighter Command’s performance was widely criticised at the time, with some perceiving its contribution as limited due to the rapid German advance. In reality, RAF squadrons fought with determination, providing crucial air cover for retreating troops and the Dunkirk evacuation. Though heavily outnumbered and sustaining severe losses, their actions disrupted Luftwaffe operations and preserved a core of experienced pilots, laying the groundwork for Britain’s defence in the Battle of Britain.

https://www.facebook.com/rafcommand

...fighting its own private war...

Rigid command structures hampered joint operations.

Fighter Command jealously guarded control over its units, and naval commanders complained that they couldn’t speak directly with RAF officers during combat.

This lack of coordination meant RAF fighters often arrived too late - or in too small numbers - to defend vulnerable ships.

The Admiralty’s frustration grew. It seemed to them that the RAF was fighting its own private war, detached from the wider struggle.

...hardly the basis for strong wartime collaboration...

Vice Admiral Max Horton, in charge of operations at Dover during the Dunkirk evacuation, attempted to bridge the gap.

He requested a face-to-face meeting with Air Chief Marshal Hugh Dowding to iron out the issues.

Instead, Horton was told to write a formal complaint - hardly the basis for strong wartime collaboration.

The meeting never happened.

Vice Admiral Max Horton who attempted to improve coordination between the Royal Navy and the RAF.

...quickly strained its resources...

Air Vice-Marshal Keith Park, commander of RAF 11 Group, Fighter Command.

https://www.facebook.com/worldwarincolor/photos

The question of protecting shipping was especially controversial.

Each day, around a dozen convoys passed through the Channel, and about a third were attacked. RAF 11 Group, under Air Vice-Marshal Keith Park, bore the responsibility of defending southeastern England, and convoy protection quickly strained its resources. Ironically, the strategy of hugging the coastline for safety backfired.

Operating close to the continent gave German bombers the tactical advantage. Radar along the coast provided minimal warning, and the Luftwaffe, operating from nearby bases in France, could strike swiftly and withdraw before fighters could intercept.

Permanent fighter patrols over convoys were one solution, but they exhausted pilots and left the RAF reacting rather than acting. The Germans dictated the tempo.

...urging the Navy to use convoys as bait...

Although the Air Staff officially supported convoy defence, Dowding believed that Fighter Command’s resources had to be preserved for the decisive air battles he saw on the horizon.

He anticipated that the Luftwaffe would launch widespread attacks—not just on convoys but on airfields, ports, and factories—to bait RAF fighters into costly combat.

On 3 July, Dowding requested that merchant convoys be rerouted north around Scotland, alleviating pressure on his squadrons.

The Air Ministry agreed—until, bowing to naval pressure, it reversed course four weeks later. On 9 August, Prime Minister Churchill was still urging the Navy to use convoys as bait to lure German bombers into action.

The tactic worked, but it came at a heavy cost in aircraft and experienced pilots.

...the invasion threat felt real...

Beyond Britain’s shores, RAF reconnaissance aircraft like Spitfires and Lockheed Hudsons flew high-risk sorties, photographing ports from Norway to Spain in search of signs of an imminent invasion.

They found nothing—until mid-August, when photos showed barges amassing at northern French ports. Suddenly, the invasion threat felt real.

Bomber Command was already engaged in nightly raids against German-held ports, factories, and airfields. Its Blenheim bombers, flying mostly in daylight, hit Luftwaffe bases when weather permitted.

...made strafing runs suicidal...

By July, port infrastructure and shipping had become priority targets. But with German airfields numbering in the hundreds—and their aircraft dispersed and well-defended—bombing results were poor.

Heavy flak made strafing runs suicidal, and the vulnerable Blenheims, often grounded by bad weather, required near-complete cloud cover to proceed.

By late June, 90 percent of sorties were aborted. When the moon rose, a few Fairey Battles and Blenheims flew night missions, but losses were severe - 72 bombers were lost in July alone.

...technology lagged behind ambition...

Fighter Command, for its part, struggled with night combat. In June, it claimed 21 bombers shot down in darkness, but only seven could be confirmed.

Night air defence remained primitive.

There were no purpose-built night fighters, no effective radar for tracking aircraft after they crossed the coast.

As the Blitz intensified in October, the Luftwaffe flew 5,900 night sorties, losing just 23 planes—a mere 0.4% loss rate. These failures ultimately cost Dowding his position in November 1940.

Despite their courage, Britain’s airmen were still feeling their way through a rapidly evolving war. Coordination was flawed, technology lagged behind ambition, and institutional rivalries undermined unity of effort.

But in the crucible of the Battle of Britain, every costly lesson shaped the defences that would, in the end, hold.


Breaking the Codes

After the fall of France in June 1940, the volume of Luftwaffe Enigma signals intercepted by British codebreakers dropped sharply.

With secure landlines now running through occupied territory, the Germans relied less on radio.

But by the end of June, enough messages trickled through to reveal a clear and ominous picture: the Luftwaffe was regrouping in Belgium and Holland, preparing for a major offensive against Britain.

Photographic reconnaissance flights confirmed the construction of longer runways across enemy-occupied airfields.

Though no invasion fleet had yet been spotted in the Channel ports, these signs suggested that preliminary air operations were imminent.

...launched a wave of daylight attacks...

On 10 July, after weeks of minor night raids, the Luftwaffe launched a wave of daylight attacks targeting British ports, coastal convoys, and aircraft factories—marking the opening phase of the Battle of Britain.

Thanks to earlier Enigma decrypts and intelligence work, Britain’s Air Intelligence branch (AI) had already predicted this shift.

For months, codebreakers at Bletchley Park had been piecing together the Luftwaffe’s structure, order of battle, and equipment by analysing tactical signals sent in less-secure radio codes.

These breakthroughs allowed British intelligence to revise key assumptions, reducing their estimate of Germany’s bomber strength from 2,500 to around 1,250 by 6th July—much closer to the actual figure of 1,500–1,700.

...they recognised that a major effort was looming....

While the Luftwaffe preferred to communicate strategic changes by landline, hints of shifting plans still surfaced in encrypted messages.

One such discovery was the code name Adlertag—“Eagle Day”—and its association with operations scheduled between 9 and 13 August.

Though the British didn’t yet understand its exact meaning, they recognised that a major effort was looming.

As the Luftwaffe's attacks intensified in the Kanalkampf—the "Channel Battle"—Enigma decrypts began to offer more tactical insights: raid sizes, timings, and sometimes even targets. But this information often arrived too late to be actionable.

Rapid Luftwaffe changes rendered some of the intelligence obsolete before it reached RAF commanders. Coordination between Enigma intercepts and other intelligence sources, particularly RAF Y-stations, was also inconsistent.

...intercepting German wireless transmissions...

RAF Y-stations operated independently from Bletchley Park, intercepting German wireless transmissions between aircraft and their ground controllers.

These stations sometimes picked up Luftwaffe sightings of British convoys or overheard plans for imminent strikes.

By August, this real-time voice traffic began to complement radar and Enigma data more effectively.

The key to this eavesdropping effort was a dedicated team of German-speaking women from the Women’s Auxiliary Air Force (WAAF) and the Women’s Royal Naval Service (WRNS).

...a cat-and-mouse game in the air...

Operating from RAF Kingsdown in Kent and other listening posts, they monitored Luftwaffe radio telephone conversations and fed intelligence into the heart of the Dowding system—Fighter Command’s integrated air defence network.

Voice transmissions occasionally revealed crucial details beyond radar’s reach: the height of incoming formations, distinctions between bombers and fighter escorts, orders for diversionary attacks, and even real-time Luftwaffe reactions to RAF countermeasures.

It was a cat-and-mouse game in the air, and every intercepted word brought Britain a little closer to staying one step ahead.


Convoys Under Fire: Coal, Codes, and Chaos at Sea

With the fall of France and the Low Countries in spring 1940, the Luftwaffe gained immediate access to airfields along the English Channel, drastically shortening the range to their targets.

The result was a swift and deadly escalation in German attacks on British coastal shipping. In the North Sea, the Grimsby fishing fleet had already felt the sting of air assault, suffering two attacks in June alone.

By July, air raids had become so frequent that shipping losses off the east coast exceeded those caused by naval mines.

...could disrupt bombing runs...

Merchant ships, minesweepers, and patrol vessels found themselves increasingly vulnerable.

The Royal Navy’s limited supply of light anti-aircraft weaponry left convoys exposed, particularly as the bulk of Britain’s air defence resources had been redirected to the southeast in anticipation of a possible invasion.

Despite the shortage, the Admiralty maintained that ships should fire upon any aircraft taking an apparent attack course - an aggressive tactic that, when executed with precision and volume, could disrupt bombing runs and even down enemy aircraft.

...better recognition training and improved communication were essential...

However, this approach had unintended consequences.

Poor training and limited experience in aircraft recognition among naval crews led to numerous cases of "friendly fire" against RAF planes - even those providing direct escort.

The RAF strongly objected to the Admiralty's rule requiring ships to fire at unidentified aircraft within 1,500 yards.

As more pilots were mistakenly attacked, it became clear that better recognition training and improved communication were essential.

Over time, both airmen and seamen adapted, reducing incidents through better coordination and discipline.

...industry, railways, shipyards, and power stations relied heavily on coal...

Among the most vital shipping operations were the coal convoys.

British industry, railways, shipyards, and power stations relied heavily on coal from Wales, Northumberland, and Yorkshire.

These massive shipments moved by sea to London Docks and other key ports, with routes threading dangerously through the North Sea and the Channel - waters now patrolled by the Luftwaffe.

Coal convoys followed designated routes. Those sailing east from Wales and Glasgow were known as CE (Coal East) convoys, while those returning were designated CW (Coal West).

...lumbering, and highly exposed...

Their passage was painstakingly choreographed: destroyers and armed trawlers from multiple Royal Navy commands handed off escort duty like runners in a relay race—from Falmouth to Portland, to Portsmouth, to Dover, and finally to the Thames Estuary.

Slow, lumbering, and highly exposed, these ships were sitting ducks for German bombers.

Yet the need was urgent: the south coast required 40,000 tons of coal per week, and the rail network simply couldn’t handle the load.

...a clumsy mouthful ripe for garbled transmission...

To maintain operational security and ease of communication, convoys were given code-names.

Rather than broadcasting a designation like “CW 9” over radio - a clumsy mouthful ripe for garbled transmission - naval command assigned simple, reusable words such as Peewit, Booty, Bacon, or Fruit.

These codenames were reserved for use by convoy escorts and senior officers only; merchant crews were forbidden from broadcasting them.

For example, CW 9 (Peewit) was the codename for a July convoy that would soon find itself under ferocious German attack.

...battlegrounds in a war of attrition...

The convoys that crept along Britain’s shores during this time were more than logistical efforts—they were battlegrounds in a war of attrition.

Each coal ship that made it to port helped keep factories humming, lights burning, and trains running.

But each one risked becoming a blazing wreck under German bombs.

As Kanalkampf intensified, Britain’s struggle to defend its lifelines at sea became just as vital—and just as costly—as the air war above.


10th July

On 30 June 1940, Göring ordered the Luftwaffe’s II. and VIII. Fliegerkorps—rich in Stuka dive-bombers—to take the fight to Britain’s coastal lifelines.

Oberst Johannes Fink, the new Kanalkampfführer, coordinated strikes on Channel convoys, pairing Bf 110 “destroyers” as close escort with Bf 109s free to hunt RAF fighters.

The aim was twofold: sink merchantmen carrying coal, food, and raw materials—and lure Fighter Command into battle.

The 10th July dawned grey and wet, but the Luftwaffe pressed on. At 05:15, the first bombs fell on RAF aerodromes in East Anglia, causing minor damage but destroying several parked aircraft.

At 08:15, a Do 17 was intercepted off Yarmouth; its pilot and observer killed before it crashed into the sea—the RAF’s first confirmed kill of the Battle of Britain.

...clashing in a swirling dogfight...

Convoy CW 3, codename Bread, became the day’s main target.

Spotted mid-morning, it was attacked at 13:50 by 26 Dorniers, 30 Bf 110s, and 20 Bf 109s.

RAF Hurricanes and Spitfires scrambled from multiple squadrons, clashing in a swirling dogfight over the Channel.

Flying Officer Peter Higgs of No. 111 Squadron was killed when his Hurricane collided with a bomber.

German claims of sinking a cruiser and four merchant ships proved wildly exaggerated—only a single sloop was lost—while German losses reached at least 14 aircraft.

...beginning the war of attrition...

Later, sixty Ju 88s from Luftflotte 3 bombed Swansea and Falmouth, wrecking an ammunition factory, damaging port facilities, and sinking several ships, including the tanker Tascalusa.

By nightfall, both sides had suffered losses, but Britain’s convoys continued to sail.

For the Luftwaffe, the day was a probing strike—testing RAF response times, assessing convoy defences, and beginning the war of attrition Göring hoped would clear the skies for invasion.

For the RAF, it was the first real day of the battle for Britain’s survival.


11th July

On 11th July 1940, the English Channel became a fierce battleground as the Kanalkampf escalated into a series of intense aerial and naval clashes.

At dawn, scattered Luftwaffe raids tested British defenses from Yarmouth to Flamborough Head.

Bombs fell on the Royal Engineer Headquarters in Derbyshire and an ammunition truck near Bridlington, causing extensive damage but no confirmed casualties.

...disrupted the attack...

By 07:00, RAF Spitfires and Hurricanes scrambled to intercept German bombers.

No. 66 Squadron damaged a Dornier Do 17 near Walton-on-the-Naze, while Douglas Bader’s No. 242 Squadron shot down another off Cromer, losing one Hurricane pilot rescued after bailing out.

The main morning strike saw Ju 87 Stukas of StG 2, escorted by Bf 109s, target a British convoy in Lyme Bay.

Despite valiant efforts by No. 501 and 609 Squadrons, the Stukas sank HMS Warrior II, killing one crewman.

RAF fighters disrupted the attack but suffered losses, including Sgt. Dixon.

RAF personnel examine the wreck of Heinkel He 111H (G1+LK) of 2./KG 55 on East Beach, Selsey in Sussex, shot down by P/O Wakeham and P/O Lord Shuttleworth of No. 145 Squadron on 11th July 1940 during a sortie to attack Portsmouth dockyards. Oblt. Schweinhagen, Ofw. Slotosch and Fw. Steiner were all captured wounded. Uffz. Mueller died on his way to hospital and Ofw. Schlueter died of his wounds the same day.

https://battleofbritain1940.com/entry/thursday-11-july-1940/    © IWM (HU 72441)

...the Luftwaffe paid a heavy price...

At 11:10, a major raid on Portland Harbour involved Ju 87s escorted by about 40 Bf 110s.

RAF Hurricanes and Spitfires engaged fiercely, shooting down several German aircraft, including four Bf 110s and killing Oberleutnant Hans-Joachim Göring.

Although Portland’s harbour was damaged, the Luftwaffe paid a heavy price, exposing the vulnerability of the Bf 110 escort fighters.

...serious damage to the city’s gasworks...

Later, a Heinkel He 111 raid on Portsmouth was met by Hurricanes from Nos. 601 and 145 Squadrons, resulting in significant German bomber losses and serious damage to the city’s gasworks.

Pilots reported German attempts to jam British radar using metallic debris.

Night raids continued with bombings on Bristol and other targets, but RAF night fighters, hindered by clouds, made no interceptions.

The day highlighted growing Luftwaffe confidence but also revealed weaknesses exploited by the RAF.

The Battle of Britain edged closer to a decisive confrontation.

The nose gunner in the HE-111 German medium bomber. On 11 July 1940, Heinkel He 111 bombers of the Luftwaffe spearheaded attacks against British shipping in the Channel. Operating in tight formations, they targeted convoys with a mix of bombs and defensive fire, testing RAF Fighter Command’s ability to respond. Escorting Bf 109s sought to fend off Hurricanes and Spitfires, but several Heinkels were lost in the fierce combats. The day revealed both the resilience of British defences and the He 111’s vulnerability without strong fighter cover.

https://www.forcesnews.com/heritage/wwii/luftwaffes-image-invincibility-during-battle-britain-shattered-within


12th July

On the 12th July 1940, the Kanalkampf raged relentlessly from the Thames Estuary to the Scottish coast amid grey skies and heavy rain.

British convoys Booty and Agent steamed along vital coastal routes, targeted by persistent Luftwaffe reconnaissance and bombing raids, especially near Portland and the East Anglian coast.

Early engagements saw Flying Officer J.H.L. Allen shot down near Orford Ness, emphasizing the deadly risks of routine patrols.

...a swift RAF response...

By mid-morning, powerful Luftwaffe formations of Heinkel He 111s and Dornier Do 17s attacked the convoys, prompting a swift RAF response from multiple squadrons including Douglas Bader’s No. 242 Squadron.

Fierce dogfights resulted in several German bombers being downed, including the loss of Staffelkapitän Hauptmann Machetzki, while the convoys suffered minimal damage - only the SS Hornchurch was sunk.

Farther north, the Luftwaffe bombed Aberdeen’s shipyards and city, killing dozens of civilians and damaging infrastructure.

...killing dozens of civilians and damaging infrastructure...

Spitfires intercepted and downed enemy bombers, including one crashing into a local ice rink, adding to the devastation.

Afternoon raids continued along the south coast and the Solent, with German bombers striking naval and coastal targets but suffering losses, such as a He 111 crashing into a pub near Portsmouth.

Multiple skirmishes across Cornwall, Devon, and Norfolk involved Hurricanes and Spitfires, with successful interceptions like the shooting down of a He 111 off Essex by No. 74 Squadron.

Nightfall brought further Luftwaffe raids on South Wales, Somerset, and Scotland, continuing the unyielding pressure on British defenses.

The 12th of July marked a brutal day of attrition and resilience, highlighting the expanding scope of the Luftwaffe’s campaign and the fierce RAF defense that would shape the Battle of Britain’s outcome.

Heinkel 111P G1+FA of Stab./Kampgesschwader 55. Coming in over the Isle of Wight and Southampton Water it was attacked by six Hurricanes of Nº 43 squadron and promptly dropped the bomb load of sixteen 50 kg and crash landed near the 'Horse and Jockey Inn', Hipley, NW of Portsmouth, Hampshire, on the 12th July 1940. The aircraft pictured shortly after landing and disguised from the air, to prevent the Luftwaffe sighting it and damaging it beyond repair. The five crew were taken prisoner but the observer died of his wounds in hospital.  
https://www.facebook.com/colourbyRJM


July 13th

Saturday, 13 July 1940 began under a shroud of fog along England’s southern coast.

As the haze lifted, the Luftwaffe pressed its Kanalkampf offensive, striking at Channel convoys and coastal points from Portland to Dover.

Fighter Command rose to meet them, sparking fierce clashes in the air. Morning skirmishes saw Hurricanes from No. 501 Squadron down a Dornier Do 17 west of Southampton, while No. 43 Squadron destroyed a Heinkel He 111 over Spithead.

These early duels foreshadowed the day’s escalating violence.

...were pounced on by Hurricanes and Spitfires...

At 14:20, forty German aircraft—Ju 87 Stukas with Bf 110 escorts—targeted a convoy off Portland.

Missing their prey, they formed defensive circles and were pounced on by Hurricanes and Spitfires.

One Bf 110 fell, two Stukas failed to return, but the RAF lost Flt. Lt. J.C. Kennedy in combat.

By 17:30, Stukas and Bf 109s struck Dover Harbour and a nearby convoy.

AA guns and No. 64 Squadron Spitfires drove them off, claiming several probable kills.

Junkers Ju 87 Stuka dive bombers during Kanalkampf. In early July 1940, the Ju 87 Stuka dive-bomber became a feared weapon against British convoys in the Channel. Its terrifying siren, precision bombing, and steep diving attacks proved highly effective against shipping. Yet, despite initial successes, the Stuka’s vulnerability soon became apparent. Lacking speed and defensive armament, it suffered heavy losses when confronted by RAF fighters. These early encounters foreshadowed the Stuka’s diminishing role as the Battle of Britain intensified.

https://battleofbritain1940.com/entry/saturday-13-july-1940/

...minor raids harried convoys off Harwich and North Foreland...

The day’s fiercest combat erupted off Calais at 18:00, when No. 56 Squadron’s Hurricanes and No. 54 Squadron’s Spitfires tangled with Ju 87s and JG 51 fighters attacking Convoy CW 5.

RAF pilots claimed multiple kills, including Leutnant Hans-Joachim Lange of JG 51, but suffered losses. HMS Vanessa was disabled by near-misses.

Elsewhere, minor raids harried convoys off Harwich and North Foreland.

Scattered bombs fell in Dorset and Dundee without major effect.

Nightfall brought reduced Luftwaffe activity, mostly suspected minelaying. At 23:10, a massive explosion ripped through the High Duty Alloys Factory at Slough, killing one and injuring 45.

Bombs also fell on railway lines in Co. Durham, damaging property and killing livestock. The third full day of the Battle of Britain closed with both sides bloodied, neither willing to yield the Channel skies.


July 14th

Sunday 14 July broke clear and calm over southern England — perfect for flying, perfect for killing.

The Luftwaffe’s morning was scattered: reconnaissance flights, light bombing, and coastal convoy harassment.

Near Manston, radar spotted a lone Dornier Do 17 with heavy Messerschmitt escort. No. 65 Squadron Spitfires from Biggin Hill intercepted, downing one Bf 109 and damaging others.

The convoy passed untouched.

An address given by British Prime Minister Winston Churchill on July 14th 1940.

https://www.battle-of-britain.org.uk/history/battle-of-britain-july-1940-day-by-day

...the chaotic dogfight above Dover...

The main strike came that afternoon.

Convoy CW 6 — “Bread” — off Dover drew over forty Ju 87 Stukas, twenty-plus Do 17s, and swarms of Bf 109s and Bf 110s. RAF squadrons from Biggin Hill, Croydon, and Manston scrambled.

In the chaotic dogfight above Dover — over 100 aircraft locked in combat — the RAF claimed three Stukas and three 109s.

But No. 615 Squadron lost Pilot Officer Michael Mudie, shot down and mortally wounded despite rescue from the Channel.

A British convoy under air attack by German dive-bombers on 14 July 1940. On this day, Luftwaffe operations focused on attacks against Channel convoys. Several raids were launched during the day, with dive-bombing Stukas and fighter escorts targeting merchant shipping. RAF Fighter Command responded with patrols and interceptions, though many encounters were hindered by weather and visibility. Losses were sustained on both sides, but the attacks underscored the German strategy of disrupting Britain’s supply lines and testing RAF defences during the Kanalkampf phase of the Battle of Britain.

https://battleofbritain1940.com/entry/sunday-14-july-1940/

...a commentary many found thrilling, others distasteful...

The Luftwaffe damaged two freighters and sank SS Island Queen.

From Dover’s cliffs, BBC reporter Charles Gardner broadcast live, mistaking Mudie’s Hurricane for a falling Stuka — a commentary many found thrilling, others distasteful.

By late afternoon, worsening weather curtailed large raids. Scattered attacks persisted: a Ju 88 fell to anti-aircraft fire; bombers probed eastern England; minor reconnaissance reached Scotland.

...causing explosions and damage...

After dark, He 111s targeted Bristol’s Avonmouth docks and smelting works, causing explosions and damage.

Further raids scattered bombs over Kent, Suffolk, and the Isle of Wight, while minelayers prowled the Thames Estuary and Harwich approaches.

Fires burned in County Durham, but casualties were nil. RAF night fighters hunted in vain through low cloud, as the Luftwaffe slipped back across the Channel.


July 15th

Low cloud and heavy haze throttled air activity, yet the Luftwaffe pressed on with scattered raids.

At dawn on Monday 15th July, Brighton suffered its first wartime strike: a lone raider bombed Kemp Town, damaging homes but causing no casualties.

Soon after, bombers from Luftflotte 3 hit Barry and Pembroke Dock, targeting ports and factories.

Luftwaffe aerial reconnaissance photo of Brighton, 1940. This photograph was produced by the German Luftwaffe (air force) during World War Two. It was almost certainly taken in 1940 as preparations were made for the German invasion of England. The photograph notes defence measures in the area, including the partially demolished piers. Brighton's piers were both broken in the centre due to fears they could be used as landing platforms by German troops. Brighton suffered it's first Luftwaffe attack on July 15th 1940, during Kanalkampf.

https://www.flickr.com/photos/rpm-brighton-hove/5883959863

...met the attackers head-on...

By early afternoon, the day’s fiercest attacks began.

At 13:41, Mount Batten in Plymouth was struck, followed by raids on Yeovil’s Westland Aircraft works and Yeovilton air base.

Spitfires of No. 92 Squadron and Hurricanes of No. 213 met the attackers head-on, downing one Ju 88 and damaging another.

RAF losses were light, with Yeovil sustaining only minor damage.

Almost simultaneously, bombs disrupted communications at RAF St Athan, Carew Cheriton, and Llandow.

...ensuring the convoy sailed on unharmed...

Mid-afternoon, around ten Do 17s targeted Convoy Pilot in the Thames Estuary.

Hurricanes of No. 56 Squadron intercepted, destroying one bomber, damaging another, and ensuring the convoy sailed on unharmed.

Elsewhere, reconnaissance flights shadowed east coast shipping; one proved deadly when SS Heworth was sunk near Aldeburgh Lightvessel.

As evening fell, Do 17s probed Portsmouth and Southampton, losing one bomber in combat.

Further north, lone aircraft reconnoitred RAF Drem and Aberdeen without attacking.

Night brought limited action: small formations approached between Newcastle and Flamborough Head, and along the Norfolk–Tyne coast, likely laying mines in Liverpool Bay and eastern waters.

One bomb fell near Berwick without casualties.

The day’s fighting was brief, scattered, and shaped by weather — yet it brought Brighton’s first raid, minor RAF damage, and another merchant loss at sea.

The Daily Express dated 15th July 1940, reporting on the RAF successes against the Luftwaffe dive bombers that day. During Kanalkampf, the RAF scored notable successes against German dive-bombers, particularly the Ju 87 Stukas. Designed for precision strikes, the Stukas proved highly vulnerable when confronted by swift and determined RAF fighter patrols. Time and again, Hurricanes and Spitfires tore into their tight formations, inflicting heavy losses and disrupting raids. These engagements showcased the RAF’s growing skill in intercepting enemy attacks and underscored the Luftwaffe’s dependence on fighter escort, foreshadowing the challenges Germany would face in the wider battle.

https://www.militariazone.com/ephemera/daily-express-july-1940-battle-of-britain/itm52037


July 16th

On 16 July 1940, a dense, stubborn fog shrouded much of France, the Straits, and south-east England, muffling the roar of engines and smothering the skies in grey.

With visibility down to a fraction, both sides found their operations strangled.

The Luftwaffe’s activity shrank to a thin trickle—probing flights, weather reconnaissance, and the occasional opportunistic strike.

Even so, there were sudden flashes of action.

...feeding precious data back to the Luftwaffe....

At dawn, a lone German aircraft ghosted in near Bristol, veering out to sea by Swanage.

Its mission was not to fight but to measure the weather, feeding precious data back to the Luftwaffe.

Through the late morning and midday, more solitary plots appeared off Lizard Point and Start Point, searching for convoys that never came within reach.

Over Cardiff, a Heinkel He 111 emerged briefly from the haze, but RAF fighters scrambled in vain - the cloud swallowed their prey whole.

...bore the brunt of the day’s violence...

North-east Scotland bore the brunt of the day’s violence.

Just after 16:00, bombs fell on Peterhead, striking even the prison grounds, while Fraserburgh and Portsoy suffered blasts that rattled harbour walls.

No lives were lost, but the damage was real. Spitfires from No. 603 Squadron caught a He 111 from III./KG 26 over the North Sea and sent it crashing into the waves, its surviving crew adrift in a dinghy.

...awaiting the moment air superiority could be seized...

By late afternoon, the fog loosened its grip over the Solent, allowing a skirmish worthy of the name.

Junkers Ju 88s approached the Isle of Wight, only to be met by Hurricanes from No. 601 Squadron.

Two German bombers plunged into the sea, their mission foiled.

That same day, far from the Channel’s mists, Hitler signed Directive No. 16. Operation Sea Lion was now in motion - the invasion of Britain set upon the horizon, awaiting the moment air superiority could be seized.


17th July

Wednesday 17th July 1940, was a day of muted warfare, its fury dampened by low cloud and relentless rain across the Channel and Britain.

The weather, a silent ally to the defenders, grounded many of the Luftwaffe's reconnaissance flights and restricted their offensive actions.

It was the first full day of operations following Hitler's Directive No. 16, the order setting the stage for Operation Seelöwe, but there was no grand assault.

Instead, the day was defined by sporadic, probing raids, a relentless campaign of harassment and tactical reconnaissance.

...disappearing before the RAF could respond...

In the south, a lone Dornier Do 17 from KG 2 slipped through the clouds toward RAF Kenley, only to be intercepted by RAF fighters and chased back out to sea.

In another brief but brutal encounter, Flying Officer Donald Taylor's Spitfire was downed near Beachy Head by Leutnant Helmut Wick, a surprise attack that left Taylor seriously wounded.

The raiders used the cloud cover to their advantage, disappearing before the RAF could respond.

...production remained uninterrupted...

Over Scotland, the day’s most significant raid took place as six Heinkel He 111s from III./KG 26 bombed the Imperial Chemical Industries (ICI) factory at Ardeer.

The attack caused damage, but production remained uninterrupted.

As the formation retreated, Spitfires from No. 603 Squadron intercepted them, successfully downing one Heinkel into the North Sea, with two survivors later rescued.

...a frustrating mix of hit-and-run strikes and small victories...

As night fell, the fighting shifted to a more insidious form.

The Luftwaffe launched raids into the Bristol Channel and off the East Coast, with minelaying strongly suspected.

Bombs fell in dispersed locations, causing minor damage but no casualties.

The day's events, a frustrating mix of hit-and-run strikes and small victories, proved that even on a quiet day, the battle for Britain was still being fought in the shadows.


18th July

After days of unsettled skies, 18 July saw a modest uptick in Luftwaffe activity despite lingering rain and cloud cover across southern England.

Fighter Command remained vigilant as German reconnaissance and harassment raids swept the south and east coasts.

Though no major bombing raids materialised, the day unfolded as a series of sharp engagements and probing incursions.

Between 07:40 and 08:30 hours, four German formations crossed the coast between Portland Bill and Bournemouth, pushing inland toward Castle Cary, Bruton, and as far north as Abingdon and Upper Heyford.

No bombs were dropped—these were likely reconnaissance missions testing RAF response.

...damaging homes and infrastructure...

At 09:30 hours, thirty Bf 109s from JG 51 crossed the Channel. Spitfires from Nos. 610 and 152 Squadrons scrambled, clashing over Beachy Head.

Pilot Officer P. Litchfield was killed when his Spitfire was downed by Hauptmann Horst Tietzen—his tenth confirmed kill.

Around 11:45 hours, a lone Ju 88 bombed Penarth, damaging homes and infrastructure. RAF fighters intercepted, killing the rear gunner, but the bomber escaped.

By 13:00 hours, No. 145 Squadron downed a He 111 south of Bognor Regis.

At 15:15, No. 609 Squadron intercepted Ju 88s off the Isle of Wight, destroying one but losing two Spitfires. Both pilots survived, rescued by Royal Navy vessels.

...scattered destruction and rising tension...

Later, No. 111 Squadron likely downed a Hs 126 over the Channel. Bombs fell at Gosport, Ringwood, and Newport, while RAF St Athan suffered a direct hit, killing one and injuring several.

Night raids resumed after 23:50 hours, with minelaying off Cumberland, Liverpool, and the Yorkshire coast.

Bombs struck Leith, Gillingham, and Jersey Marine, damaging docks, homes, and railways.

The day ended with scattered destruction and rising tension - Britain braced for the storm ahead.


19th July

The morning of Friday July 19th began with scattered showers and fleeting sunshine, but the skies over Britain were anything but calm.

At 06:03, German bombers struck Norfolk and Norwich Aerodrome, destroying a fire service hangar and clubhouse.

An hour later, Hurricanes of No. 145 Squadron intercepted and downed a Dornier Do 17 off Shoreham. At 10:13, Glasgow was bombed by two Dorniers.

Eight high-explosive bombs hit Govan and Scotstoun, killing two and injuring 40.

Windows shattered at the Royal Ordnance Factory, though operations continued.

...became known as “The Slaughter of the Innocents.”...

By midday, thirty German aircraft massed near Cap Gris-Nez. RAF scrambled Hurricanes, Spitfires, and Defiants.

No. 141 Squadron, newly arrived at Hawkinge, was ambushed at 13:00 by Bf 109s. Exploiting the Defiants’ lack of forward guns, German fighters shot down six in minutes.

Four RAF pilots died, six gunners went missing.

The event became known as “The Slaughter of the Innocents.” At 16:00, another wave hit Dover. RAF squadrons intercepted, claiming several kills.

Flight Sergeant G. Turner bailed out of his burning Hurricane and survived. The oiler War Sepoy was destroyed; HMS Griffin and others were damaged.

...relentless assault, fierce resistance, and sobering losses...

Later, Hurricanes clashed with Bf 109s off Selsey Bill. One pilot drowned after bailing out.

A Heinkel He 111 was downed near Shoreham, though its pursuer crash-landed.

Night brought minelaying raids from the Isle of Wight to Harwich, and bombings from Abbotsinch to Stirling.

At 01:07, an RAF Blenheim shot down a German seaplane near Harwich.

Meanwhile, in Berlin, Hitler delivered his “Last Appeal to Reason,” claiming Luftwaffe dominance and promoting Göring to Reichsmarschall. Aces Mölders and Galland were also elevated.

It was a day of relentless assault, fierce resistance, and sobering losses - etched into the turbulent skies of Britain’s fight for survival.


20th July

The morning of Saturday 20th July 1940 dawned unsettled over southern Britain, storms breaking into clear skies by midday.

In Berlin, Hitler had just handed Göring sweeping powers to prepare for the decisive struggle for air superiority.

Across the Channel, the Luftwaffe pressed ahead, its probing raids sharpening into sustained pressure against Britain’s lifelines.

At 05:21 hours, radar tracked forty German aircraft over the Thames Estuary. Hurricanes of No. 54 Squadron scrambled but failed to engage.

Soon after, No. 56 Squadron shot down a Ju 88 near St Osyth, the day’s first success.

Yet German raiders struck stationary lightships along the coast, a reminder of Britain’s exposed edges.

...the convoy endured...

By late morning, the focus turned to shipping. Convoy Bosom, moving steadily east, became the day’s battleground.

At 13:00 hours, Ju 87s of III./StG 2 with Bf 109 escorts dived on the convoy near Swanage, meeting Hurricanes of No. 238 Squadron and Spitfires of No. 152.

Both sides lost aircraft, but the convoy endured.

Heinkel He 59 seaplanes shadowing the ships were hunted down and destroyed, their crews killed.

The fiercest fighting erupted in mid-afternoon. Around 15:00 hours, forty Ju 87s with escorts drove toward Dover Harbour, clashing with Hurricanes of No. 32 Squadron.

An hour later, No. 501 Squadron struck hard, Flight Sergeant “Ginger” Lacey downing a Bf 109 flown by Gruppenkommandeur Helmut Riegel, a serious blow to JG 27.

...sorties scattered mines and bombs...

The climactic raid came at 17:40 hours, when fifty Stukas of II./StG 1, shielded by Bf 109s and 110s, fell upon Convoy Bosom off Dover.

RAF fighters from four squadrons tore into them. Ju 87s and Bf 109s fell, but the convoy suffered: the coaster SS Pulborough was sunk, the destroyer HMS Brazen hit repeatedly and lost, and other vessels damaged.

By nightfall, the battle shifted to the dark. Over fifty German sorties scattered mines and bombs from the Humber to the Bristol Channel.

RAF Blenheims and anti-aircraft fire claimed rare night victories, bringing down a He 59 and an Fw 200.

The day closed with Britain bloodied but unbowed.

The pattern was clear: the Luftwaffe was tightening its grip, and the Battle of Britain was entering a new, more dangerous phase.


21st July

The morning dawned fine and clear, though clouds gathered before dispersing again in the evening.

Much of the Luftwaffe’s focus remained on disrupting British coastal convoys, particularly Peewit (CW 7), threading its way through the Dover Strait under the watchful guard of Fighter Command’s standing patrols.

At 09:20 hours, a Spitfire of No. 54 Squadron, patrolling the convoy lanes, suffered engine failure and plunged into the sea east of Clacton.

Pilot Officer J.L. Kemp baled out safely and was rescued by the Royal Navy.

Copy of the Sunday Star, 21st July 1940 reporting on the German air offensive on Britain. Foreign media closely followed the unfolding Battle of Britain and the opening Kanalkampf phase. American newspapers portrayed it as a dramatic duel for air supremacy, often emphasizing Britain’s defiance and the RAF’s resilience against heavy odds. Neutral observers highlighted German air power but increasingly framed Britain as embattled yet unbroken. In Europe and beyond, coverage was coloured by political leanings: Axis states proclaimed imminent victory, while Allied and neutral outlets hailed the struggle as democracy’s fight for survival.

...the combat proved costly...

At 14:58 hours, Dornier Do 17s of KG 3, escorted by Bf 109s of JG 27 and Bf 110s of V./LG 1, struck south of the Needles.

Hurricanes of No. 43 and No. 238 Squadrons intercepted, breaking up the attack.

The convoy escaped unscathed, but the combat proved costly: one Bf 110 crash-landed in France, while Pilot Officer R.A. DeMancha of No. 43 Squadron was killed when his Hurricane collided mid-air with a Bf 109.

...preparing for the next, heavier phase of the campaign...

Earlier, a Bf 110 C-5 of 4.(F)/14 had shot down two RAF trainers before being forced down near Goodwood by No. 238 Squadron.

Captured almost intact, it was later delivered to Farnborough for evaluation. Scattered Luftwaffe sorties probed British shipping and coastal towns through the afternoon, with little effect but growing German losses—twelve aircraft fell during the day.

After dark, sporadic raids crossed into the West Country, Yorkshire, and Tyneside, dropping bombs but inflicting little damage.

Minelaying was suspected near Plymouth, the Thames Estuary, and the Tyne.

Across the Channel, JG 26 completed its move to Calais airfields. Göring, in conference with Luftflotte staff, stressed avoiding premature strikes on British dockyards while preparing for the next, heavier phase of the campaign.


22nd July

The day began under unsettled skies: fair conditions in the Straits of Dover, cloudy weather across the Channel, and bright intervals breaking through over eastern England.

Light westerly winds carried the morning’s first activity.

At dawn, two convoys off the East Coast came under Luftwaffe attack. RAF fighters scrambled swiftly, intercepting the raiders; a Dornier Do 17 was engaged and later confirmed as a probable loss.

By mid-morning, reconnaissance flights intensified. At 09:22, bombs fell on Duff House, Banff - then serving as a prisoner-of-war camp - killing six German POWs and wounding eighteen more.

...which plunged into the Channel...

Further south, No. 145 Squadron intercepted a lone Do 17 near Selsey Bill.

Flight Lieutenant A.H. Boyd and Pilot Officer A.N.C. Weir destroyed the aircraft, which plunged into the Channel.

Other German formations approached but withdrew without contact.

A high-altitude bomber group later crossed Sussex, flying beyond interception range. RAF patrols shielded coastal convoys, deterring stronger attacks.

...Nightfall brought escalation...

Tragedy struck at 17:35 when Pilot Officer J.L. Bickerdike of No. 85 Squadron fatally crashed Hurricane P3895 on approach to Castle Camps.

At sea, HMS Beagle claimed a Ju 87 dive-bomber with anti-aircraft fire.

Nightfall brought escalation.

From 21:00 onward, German aircraft from Boulogne, Calais, and Cherbourg launched minelaying sorties and bombing raids across Britain.

Explosions shook Manston, Margate, Bristol, Essex, and Yorkshire. RAF night fighters achieved their first radar-assisted kill when a Blenheim from Tangmere downed a Do 17 off Brighton—an early milestone in nocturnal defence.

...marking a sharpening of Luftwaffe strategy...

Bombs fell on Edinburgh and Leith, causing fires and casualties.

In Plymouth, Leutnant Hajo Herrmann’s Ju 88 struck a barrage balloon but still completed its mine-drop.

Meanwhile, No. 804 Squadron flew its first sortie, and No. 301 (Polish) Squadron was formally established.

Göring issued new orders, prioritising mining and limited port bombardments - marking a sharpening of Luftwaffe strategy.


July 23rd

Tuesday, 23 July 1940, brought a lull compared to the intense clashes of earlier weeks.

Dowding’s decision to divert convoys to the East Coast and around Scotland left the Channel almost empty, forcing the Luftwaffe into longer, riskier missions with fewer opportunities to strike.

The day began quietly. Hurricanes on patrol off Yarmouth claimed to have brought down a Junkers Ju 86, though confirmation proved elusive.

A convoy near Lowestoft sent out a distress signal at 08:09, yet only a single bomb was seen falling harmlessly from high altitude.

Another raid pushed inland towards Kenley but quickly turned back when RAF fighters closed in, dropping no bombs.

...bombers slipped through undetected...

By late morning, six German aircraft attacked trawlers off North Foreland, but RAF squadrons vectored to intercept failed to make contact.

At 15:30, nine bombers slipped through undetected and struck a Royal Navy vessel east of Harwich, the results unknown.

More dramatic action came in Scotland at 15:40, when three Spitfires of No. 603 Squadron intercepted and destroyed a Dornier Do 17 near Kinnaird’s Head.

An hour later, German bombers dropped sixteen high-explosive bombs on Air Ministry property at Pulham Market, causing structural damage but no casualties.

...a broader spread of raids...

After 18:00, RDF tracked raiders over northern Scotland, but they escaped into cloud.

Across the Channel, German aircraft loitered between Calais and Dunkirk, suggesting reconnaissance rather than attack.

Nightfall brought a broader spread of raids. Minelaying dominated, stretching from Dover to the Forth Estuary.

A Heinkel He 111 was destroyed near Dunbar, while bombs fell harmlessly near Montrose.

Anti-aircraft fire claimed an unconfirmed kill over Liverpool, and bombs landed from Cornwall to Hartlepool.

Scattered damage was reported: six homes wrecked at Willerby, roads blocked near Ternhill, and minor incidents in Norfolk, Sussex, and the Isle of Wight.


July 24th

The Luftwaffe pressed on with its war of attrition over the Channel, and Wednesday 24th July 1940 brought some of the heaviest fighting yet.

From dawn, convoys moving eastwards along the Kent coast drew the attention of German reconnaissance, soon followed by the first bomber formations escorted by Bf 109s.

The day’s operations reflected Göring’s intent to wear down Fighter Command by constant pressure on shipping, forcing the RAF into repeated defensive sorties.

24th July 1940, Supermarine Spitfire Mark Is of No. 610 Squadron based at Biggin Hill, flying in 'vic' formation. Serial Numbers removed by censor but possibly N3289 DW-K and R6595 DW-O. No. 610 Squadron RAF, known as "The Chesters," was a Royal Auxiliary Air Force unit that played a significant role during the Battle of Britain. Operating from RAF Biggin Hill, the squadron engaged in numerous air combat missions against the Luftwaffe. Pilots like Squadron Leader Andrew Thomas Smith AFC and Flight Lieutenant Edward Brian Bretherton Smith DFC were among those who served with distinction. The squadron's efforts contributed to the defense of Britain during this critical period.

(Photo source - © IWM CH 740) Royal Air Force official photographer Daventry, Bertrand John Henry (Flight Lieutenant) 

https://www.facebook.com/worldwarincolor

...several merchant vessels were struck and set ablaze...

By mid-morning, Ju 87 Stukas and He 111s descended on a convoy south of Dover, prompting an immediate scramble from Biggin Hill and Hornchurch sectors.

Fierce engagements erupted across the Channel narrows, Hurricanes and Spitfires breaking into bomber formations as 109s swept in from above.

Losses mounted on both sides: several merchant vessels were struck and set ablaze, while RAF pilots claimed multiple bombers downed.

The fighting was so intense that one German formation was broken apart before reaching its target, scattering survivors back toward France.

Messerschmitt Bf 109E-1. Werkn Nr 6296F of Stab lll/Jagdgeschwader 26. <1+1, Piloted by Oberluetnant Werner Bartels, Geschwader Technical Officer, shot down on 24th July 1940. The German Gruppe had just been directed south to a scrap over Dover where the Luftwaffe were attempting to stop the RAF from protecting a convoy off Dover. Over the Dene Valley, Margate, Bartels was shot down by a No. 65 Squadron Spitfire at 13.00 hrs, the Messerschmitt force-landing at Northdown, close to the Margate-Broadstairs railway line. Bartels was severely wounded.
Bartels was repatriated back to Germany in 1943 in a PoW exchange and later became an engineer on the Messerschmitt Me 262 programme. The Messerschmitt was later displayed to raise money for the Spitfire Fund, and is seen here on display to the public at Fairfield car park in Croydon, August 1940.

https://www.facebook.com/profile.php?id=61552719322680

...constant sorties began to reveal the wear on engines...

The attacks continued into the afternoon.

A convoy off Folkestone was harried repeatedly, ships steering evasive courses as anti-aircraft fire rose from escorts.

RAF squadrons, often vectored with only minutes’ warning, met successive raids head-on, but the strain on men and machines was growing.

For the Luftwaffe too, the constant sorties began to reveal the wear on engines, aircrews, and ground staff straining to keep aircraft serviceable.

...despite exhaustion and loss...

By evening, the convoys bore scars of the day’s ordeal—ships sunk or crippled, others limping toward safety.

Yet Fighter Command had once again met the challenge, proving its ability to blunt the Luftwaffe’s efforts despite exhaustion and loss.

For both sides, the 24th July underscored that the struggle was escalating into a relentless battle of attrition, with neither yet willing to yield the Channel skies.


25th July 

This Thursday dawned fine, with light north-westerly winds and a hazy Straits of Dover, barely restricting visibility.

From Wissant, Luftflotte 2’s forward radar stations allowed Oberst Fink to direct a relentless series of attacks against Convoy CW 8, supported by reconnaissance flights and E-boat activity. At 07:00 hours, bombers struck a convoy off Spurn Point.

Red Section of No. 222 Squadron intercepted two He 111s, claiming them as probables, though both RAF Spitfires suffered damage.

Northern raids followed: a meteorological flight over Wick, a He 111 downed between the Orkneys and Kinnaird’s Head, and an unidentified evening raid over Scapa Flow.

25th July 1940, Scramble! Pilots from 85 Squadron run for their Hurricanes during the Battle of Britain at RAF Debden.

WW2 Colourised Photos | Facebook

...clashed with over forty Bf 109s...

The first major assault on CW 8 began just after midday. At 12:07 hours, Bf 109s from III./JG 52 skated low over Dover, meeting Spitfires of No. 65 Squadron.

Flight Sergeant Franklin claimed a kill. At 12:45 hours, Hurricanes of Nos. 32 and 615 Squadrons clashed with over forty Bf 109s, leaving Pilot Officer V.G. Daw wounded and crash-landing his Hurricane.

By midday, approximately sixty Ju 87 Stukas of II./StG 1 and IV.(St.)/LG 1 dove on the convoy. Spitfires of No. 54 Squadron scrambled but lost two aircraft; Flight Lieutenant B.H. Way was killed.

Eleven coal ships sank, seven more were heavily damaged, and the destroyers HMS Boreas and HMS Brilliant were badly hit, though Boreas was towed to safety.

...a devastating day for Allied shipping...

A second wave off Folkestone around 14:30 hours brought thirty Ju 88s and fifty Bf 109s. RAF fighters, outnumbered five to one, pressed head-on attacks but suffered losses, including Squadron Leader A.T. Smith.

The final raid at 17:15 hours sank five more merchant ships, leaving only two of the original twenty-one to reach Portland.

Hurricanes and Spitfires downed one Stuka and four Bf 109s, but Sub-Lieutenant F.D. Paul and Pilot Officer A. Finnie were killed or mortally wounded. Jagdgeschwader losses included six aircraft, with notable deaths among German leaders.

By nightfall, minelaying continued in the Firth of Forth, Thames Estuary, and Bristol Channel. 25 July 1940 was a devastating day for Allied shipping and RAF squadrons, remembered as “Black Thursday” for No. 54 Squadron.


26th July

Friday 26 July 1940 brought poor flying conditions over Britain.

Heavy rain, thick cloud, and low visibility hampered large-scale operations, yet the Luftwaffe persisted with probing raids against coastal shipping and scattered inland targets.

Though several sizeable formations—sometimes fifty aircraft strong—were plotted, most turned back before reaching the English coast when challenged by Fighter Command patrols.

The first intruder came at dawn: a lone aircraft crossed at Beachy Head at 06:03, flying inland over Sussex and Kent before exiting near Hastings.

It dropped bombs at Mayfield and Hastings, demolishing houses and disrupting utilities, though casualties were light.

...veered away under RAF scrutiny...

Later, a raid near Glasgow caused little damage. At 09:00, three raids approached Swanage but veered away under RAF scrutiny.

Soon after, No. 601 Squadron clashed with Bf 109s over the Isle of Wight.

Pilot Officer P. Challoner-Lindsey was killed when his Hurricane fell into the Channel, but the squadron claimed two German fighters.

Around the same time, No. 238 Squadron engaged near Portland, where Flight Lieutenant S.C. Walch downed Feldwebel Günther Böer of JG 27.

...harried by RAF patrols...

By mid-afternoon, a force of nearly fifty aircraft advanced from the Bay of the Seine but broke apart before contact, harried by RAF patrols.

Evening brought another large Cherbourg formation, which likewise dispersed before reaching Portland.

That day, three steamers were lost in the Channel, though a direct link with the raids remained uncertain.

After dark, Luftwaffe activity intensified.

...flights prowled the Thames Estuary...

Minelaying flights prowled the Thames Estuary, Tyne, and Scottish waters, while bombs fell near Aberdeen and Dyce.

Yet damage was negligible. Strategically, No. 1 (RCAF) Squadron arrived in Britain with Canadian-built Hurricanes, bolstering Commonwealth strength.

Meanwhile, the Admiralty banned daylight shipping through Dover, acknowledging the mounting aerial threat.


27th July

After days of unsettled weather, skies cleared on Saturday, 27 July 1940, bringing renewed Luftwaffe activity across the Channel.

The morning opened with heavy blows. At 09:45 hours, Stukas from III./StG 77, escorted by Bf 109s of III./JG 27, dived upon Convoy Bacon off Swanage.

Hurricanes of Nos. 145 and 238 Squadrons and Spitfires of No. 609 Squadron rose to meet them.

In the swirling dogfights, a Bf 109 and a Ju 87 were destroyed, while a Spitfire of 609 Squadron was lost, its pilot, P.O. J.R. Buchanan, killed.

Almost simultaneously, tragedy struck off East Anglia.

The destroyers HMS Wren and HMS Montrose, covering minesweepers, came under attack from He 111s of II./KG 53.

Caught without fighter cover due to a lapse in RDF warning, HMS Wren was sunk with heavy loss of life. Montrose survived, damaged but afloat.

...bombs tore into the harbour...

The focus soon returned to Dover. At 14:30, Bf 109s struck the harbour in their first operational fighter-bomber raid, inflicting damage on dockside facilities.

A second assault at 17:30 proved even more destructive: bombs tore into the harbour and barracks, sinking the destroyer HMS Codrington and crippling HMS Walpole.

RAF fighters engaged, downing a He 59 seaplane, but also suffered losses.

With three destroyers lost in a single day, the Admiralty withdrew remaining vessels from Dover, leaving the RAF to shield Channel convoys.

Fighter squadrons in the southeast were reinforced, their strength raised to 28 aircraft.

...the Channel bloodied...

By late afternoon, Convoy Agent was attacked off Dungeness, though the targeted steamer survived.

Scattered reconnaissance flights roamed further afield over western Britain.

Nightfall brought new dangers: bombs fell on Swansea, Kidwelly, and Upton-upon-Severn, while German aircraft laid mines along the east coast as far north as the Firth of Tay.

July 27 closed with the Channel bloodied and Dover’s role as a naval base abandoned.


28th July

Dawn rose bright and deceptively calm over southern England, but peace was short-lived.

The Luftwaffe struck early. At 05:00, a Ju 88 from KG 51, bound for Crewe, became lost in cloud and force-landed near Bexhill—its crew captured before firing a shot.

Minutes later, Spitfires of No. 234 Squadron brought down another Ju 88 over Plymouth. By 06:30, Glasgow was bombed, damaging a printing works and shattering windows at the vital Rolls-Royce factory.

Soon after, shipping off Porthcawl came under attack, only for a Ju 88 to be destroyed by No. 92 Squadron.

...a rehearsal for what was to come...

Through the morning, German formations probed Britain’s defences. Raids rose from Cherbourg and nosed toward Plymouth, Swanage, Bournemouth and Portland, only to turn back—testing radar, gauging response.

At 12:04, radar detected a large enemy build-up over Calais, edging toward Dover before dispersing.

It was a feint, a rehearsal for what was to come. At 13:35, the blow fell. Nearly 100 enemy aircraft—sixty He 111s with forty Bf 109s—crossed toward Dover.

Fighter Command hurled four squadrons into the fight. Squadron Leader “Sailor” Malan’s Spitfires clashed with Messerschmitts high above the cliffs while Hurricanes drove at the bombers.

Losses mounted on both sides, but the Luftwaffe paid dearly: five fighters fell, and their commander, Major Werner Mölders, was badly wounded and forced to crash-land in France.

...relentless struggle in the air....

By late afternoon, RAF Hurricanes even attacked German rescue seaplanes east of Boulogne, downing two.

Other raids threatened Selsey, Swanage and Portsmouth, but most withdrew under pressure.

After dark, the assault shifted inland.

Bombs fell from Edinburgh to Swansea; Crewe’s Rolls-Royce works were struck, South Wales rail links severed. By 02:45, the skies finally quietened.

From dawn skirmishes to night-long bombardment, 28 July 1940 proved yet again that Britain’s fate hung on relentless struggle in the air.


29th July

Monday, 29 July 1940 dawned clear and calm over southern Britain.

A haze lay over the Thames Estuary and Dover, softening the horizon, but the skies remained ideal for flight.

The Luftwaffe seized the conditions to launch a major effort, focusing on Dover and the Channel convoys while reconnaissance and minelaying extended along the East Coast and into Scotland. 

The first alarm came shortly after 07:00 hours. Radar picked up enemy formations massing over Calais, soon confirmed by the Observer Corps.

By 07:34, over eighty aircraft had merged into a storm of forty Ju 87 Stukas escorted by fifty Bf 109s.

...clashed in a savage melee...

Dover was their target. Fighter Command scrambled Spitfires and Hurricanes from Nos. 41, 56, 64, and 501 Squadrons.

Over 200 aircraft clashed in a savage melee. RAF pilots tore into the Stukas and their escorts, claiming eight Ju 87s and seven Bf 109s, aided by anti-aircraft fire.

Two Spitfires and a Hurricane were lost. Below, Dover endured blasts: SS Gronland and the patrol yacht Gulzar sank, HMS Sandhurst burned, and oil-streaked waters licked the quays.

Luftwaffe aces scored victories, but losses were heavy—Hemmerling and Hauptmann Aichele killed.

Pilots of RAF 610 Squadron, at Hawkinge, Kent. 29 July 1940. Sgt. Ronald Hamlyn, Sgt. Norman Ramsay and P/O Constantine Pegge. All three survived the war, but P/O Pegge died in an air accident in May 1950.

Colourised by Doug
https://www.facebook.com/ColouriseHistory

...scattered raids continued...

By early afternoon, Ju 88s attacked trawlers off Dungeness, one falling to a balloon cable, another to Spitfires.

The greatest loss came at 15:00: HMS Delight, sailing from Portsmouth, was spotted, bombed near Portland Bill, and sank with six crew lost.

Evening brought renewed assaults on Harwich, Dover, and Essex convoys.

Six German aircraft were destroyed; Oberstleutnant Adolf Genth was mortally wounded. RAF losses were lighter, yet three fighters crashed.

Reconnaissance and scattered raids continued along the Channel and East Coast, while northern Scotland escaped serious engagement.

...losses mounting on both sides...

Night fell, and the Luftwaffe laid mines and dropped bombs along the East Coast, from Dover to the Firth of Forth, striking Brigg, Acklington, St Athan, and Norwich.

A crippled Ju 88 crashed near Bury St Edmunds.

From dawn to darkness, 29 July was a relentless test: Britain’s harbours and convoys under assault, Fighter Command rising time and again, losses mounting on both sides, and the skies themselves holding the fate of the nation.


30th July

Tuesday, 30 July 1940, dawned grey and restless across Britain.

Low clouds and persistent drizzle muted visibility along the Channel and southern coasts, but even poor weather could not halt the rhythm of the air war.

Fighter Command remained vigilant as the Luftwaffe continued to probe, harass, and test defences, while behind the scenes Hitler issued a decisive order postponing any invasion of Britain until at least 15 September.

...under the pressure of RAF fighters...

Morning patrols saw three separate raids approach Swanage, each turning back before reaching land under the pressure of RAF fighters.

No. 601 Squadron intercepted enemy aircraft off the Isle of Wight, claiming a probable Bf 109, while No. 238 Squadron brought down a lone Bf 109 near Portland.

Later, Luftwaffe formations totaling fifty aircraft advanced toward the Isle of Wight, only to split and return to France under RAF pressure, though one Bf 109 was destroyed off Dover by No. 65 Squadron.

...a separate force targeted Convoy Agent...

The afternoon saw renewed activity over the East Coast.

Twenty He 111s and Do 17s struck Harwich, Bf 110s attacked Dover, and a separate force targeted Convoy Agent off Essex.

Nos. 66, 17, 85, and 151 Squadrons scrambled. RAF fighters claimed six German aircraft destroyed, including Bf 110s and He 111s, while three British fighters sustained damage and made forced landings.

Dover and surrounding ports emerged largely unscathed.

...relentless patrols underscored the day’s pattern...

Northern and offshore airspace was quieter, though No. 603 Squadron intercepted and destroyed a He 111 near Montrose.

Nightfall brought scattered raids across Surrey, Devon, South Wales, and the Midlands. Bombs struck Norwich, Barry Docks, Cwm Bargoed, and Avonmouth, while anti-aircraft fire accounted for a downed He 111 near Bristol.

Despite the poor weather, the Luftwaffe’s probing flights and Fighter Command’s relentless patrols underscored the day’s pattern: reconnaissance, intermittent strikes, and cautious engagement.

Britain’s skies remained contested, the RAF undiminished, and the nation reminded that even under clouds and drizzle, the war in the air was constant, unrelenting, and decisive.


31st July

Wednesday, 31 July 1940, dawned fair across Britain, with clear inland skies and hazy Channel waters that challenged both Luftwaffe and RAF operations.

Early morning saw German reconnaissance and low-level strikes focusing on convoys off Harwich and Lowestoft.

Hurricanes from No. 1 Squadron and other RAF sections scrambled in response, shooting down a Dornier Do 215 off the Isle of Wight, though several raids turned back without engagement.

...the psychological effect of British fighters...

By mid-afternoon, Dover became the centre of intense air combat. Bf 109s from JG 2 and II./JG 51 attacked the coastal balloon barrage, met by No. 74 Squadron Spitfires.

In the running dogfight, three Spitfires were lost and two pilots killed, while Luftwaffe losses included at least one Bf 109E and confirmed kills for Oblt. Josef Fözö, Lt. Erich Hohagen, and Hauptmann Horst Tietzen, who claimed his fourteenth victory.

Additional RAF squadrons deterred further raids, demonstrating the psychological effect of British fighters.

...scattered bombing...

Northern and Scottish sectors remained quiet, apart from a Ju 88 encounter with a Sunderland flying boat and the interception of a meteorological He 111 by No. 603 Squadron near Montrose.

Most Luftwaffe formations along the French coast remained close to shore, turning back when RAF patrols approached.

Nightfall brought scattered bombing across Surrey, South Wales, and the Midlands.

Barry Docks and railway infrastructure at Cwm Bargoed were damaged, while a No. 29 Squadron Blenheim reportedly downed an enemy aircraft at sea.

Unplotted raids were also reported over Liverpool Bay and the Bristol Channel.

...claims of Britain’s imminent collapse...

Meanwhile, morale and politics stirred within the Luftwaffe.

Göring ordered the removal of the “Ace of Spades” insignia from JG 53, prompting quiet protest from pilots, while Goebbels broadcast claims of Britain’s imminent collapse.

In reality, Fighter Command maintained control of the skies, deterring attacks and limiting damage.

The day underscored the ongoing rhythm of the Kanalkampf: measured raids, determined interceptions, and Britain’s resilient defence holding firm against persistent Luftwaffe pressure.


1st August

Thursday 1 August 1940 dawned fair across much of Britain, though the Channel and Straits lay under lingering cloud.

As the morning mist lifted, the Luftwaffe’s probing raids began - small formations harassing trawlers off Selsey Bill and skirting the southern coastline.

Interceptions were limited, but Hurricanes of No. 145 Squadron engaged enemy aircraft off Hastings, downing a Henschel Hs 126 before losing Sub-Lt I.H. Kestin, whose Hurricane was shot down into the Channel.

Elsewhere, Spitfires of No. 610 Squadron skirmished near Sussex, one returning damaged.

...sparking fires...

By mid-afternoon, a more serious attack struck Norwich.

Around thirty Heinkel He 111s bombed the Boulton Paul Aircraft Works, timber yards, and railway lines, sparking fires and killing six civilians.

Industrial damage was real but limited; most aircraft under construction were untouched.

Meanwhile, No. 242 Squadron intercepted bombers near Yarmouth, downing at least one Ju 88, while further clashes off Harwich saw Dorniers engaged and one forced into the sea.

...heavy Luftwaffe concentrations...

The RAF also struck back.

Reconnaissance had revealed heavy Luftwaffe concentrations at Cherbourg, and Blenheims of Nos. 56 and 236 Squadrons mounted a bold raid.

Hangars and aircraft were hit, but German fighters responded ferociously, claiming three Blenheims, among them the first victory of Oblt. Erwin Düllberg.

...suffered a deadly hit...

Nightfall brought wider peril. Minelayers sowed the Thames Estuary and waters off Scapa Flow, while bombers struck towns from Dundee to Coventry and Cardiff.

Llanion Barracks in Pembroke suffered a deadly hit, and two magnetic mines fell near Taunton.

At sea, the SS Highlander fought off two Heinkel floatplanes, reportedly shooting both down in a dramatic engagement.

Finally, propaganda leaflets carrying Hitler’s “Last Appeal to Reason” fluttered uselessly across Welsh fields, a hollow gesture on a day when Directive No. 17 ordered the Luftwaffe to intensify its assault on Britain.


2nd August

Friday 2nd August 1940 unfolded under unsettled skies. Northern Britain enjoyed fair weather, but the Channel coast was draped in low cloud and drizzle, with visibility in the Dover Straits so poor that aerial activity was sharply curtailed through the morning.

Enemy movement was sparse, with only three tracks plotted by mid-afternoon. One formation ventured within five miles of Dover before turning back.

At 16:30 two German groups merged and pressed toward Clacton, bombing a convoy north of Herne Bay without serious effect.

RAF fighters scrambled to intercept but failed to engage.

...poor visibility and evasive tactics thwarted interception...

Later, seven raids assembled over Calais–Boulogne and swept varied courses across the Straits.

Again, poor visibility and evasive tactics thwarted interception.

Along the East Anglian coast, reconnaissance aircraft shadowed convoys and scattered ineffective bombs near Great Yarmouth.

Cannon-armed Spitfires of No. 19 Squadron briefly made contact but lost their quarry in cloud.

Though direct clashes were few, the day was marked by tragic accidents. Squadron Leader Henry “Sam” Sawyer of No. 65 Squadron was killed when his Spitfire crashed on a night patrol, likely blinded by exhaust glare.

Other mishaps saw a Hurricane overturn on landing, a Blenheim overshoot its runway, and another Spitfire destroyed on takeoff.

...underscored the menace to shipping...

Amid these setbacks came a momentous step forward: the formal establishment of No. 303 (Polish) Squadron at RAF Northolt.

Though initially resisted, the integration of Polish pilots - among them the celebrated Josef František - would prove vital to Britain’s defence.

By night, Luftwaffe bombers ranged wider. Swansea suffered bombing with casualties, while raiders pressed deep into Wales, the Midlands, Scotland, and even Lancashire. Minelaying operations from the Thames to Aberdeen underscored the menace to shipping.

Once again, propaganda leaflets fluttered down on Welsh towns, echoing Hitler’s Reichstag address, a hollow accompaniment to the thunder of bombs overhead.


3rd August

On this day, the Luftwaffe General Staff codified its boldest vision yet: Adlerangriff - the Eagle Attack - Germany’s great aerial assault to smash RAF Fighter Command.

The plan was uncompromising.

It demanded air superiority in little more than a fortnight, unfolding in three relentless phases.

First, raids would fan out across Britain’s southern approaches within a 90-to-60-mile radius of London.

...an ambitious scheme...

Then, strikes would press closer, concentrated into a 60-to-30-mile belt.

Finally, the campaign would drive straight for the capital itself.

The burden fell chiefly on Luftflotten 2 and 3, operating from France and the Low Countries, their effort supplemented by Luftflotte 5 from Norway.

It was an ambitious scheme - one that would strain German crews and machines to their very limits.

...was dominated by reconnaissance...

Enemy activity during daylight was dominated by reconnaissance over shipping and coastal towns.

In the morning, four German aircraft approached the southern coastline.

One tracked inland at St Alban’s Head, flying as far as Cardiff before returning, reportedly attacking a trawler which claimed to have brought it down - though no confirmation followed.

Similar probes followed off the Isle of Wight and Beachy Head, with British patrols unable to make contact due to cloud cover.

In the Dover Straits, formations of fifteen aircraft repeatedly threatened to cross, only to fade back across the Channel.

...suggested continued German attention...

Further north, RAF squadrons scored rare victories.

At 12:12 hours, No. 603 Squadron destroyed a Heinkel He 111 off Montrose.

Later, at 15:32 hours, No. 85 Squadron brought down a Bf 110 east of Southwold. Elsewhere, tracks over Harwich, Cromer, and Orfordness suggested continued German attention to convoys, while weather flights pressed on across the North Sea.

As dusk fell, night operations resumed: bombers probed inland, minelayers worked estuaries and harbours, and propaganda leaflets once more fluttered across Essex under cover of darkness.


4th August

Sunday, 4th August 1940, brought another day of probing Luftwaffe activity, muted in scale yet persistent in its purpose.

Poor weather over the Channel and northern France curtailed large-scale raids, but reconnaissance missions pressed on, their focus stretching from the Isle of Wight and the Bristol Channel to the South West Approaches.

A convoy anchored in St Helen’s Roads, obscured by thick fog, proved a magnet for enemy patrols.

Four separate raids nosed towards the vessels, only to sheer away at the appearance of RAF fighters.

...frustratingly elusive...

Visibility remained a constant foe, with interceptions rarely bringing aircraft into clear contact.

Other raids traced paths across the south coast - over Poole, Southampton, Middle Wallop, and Upavon - before vanishing seaward, their movements frustratingly elusive.

On the east coast, activity was sparse, save for a lone aircraft charting a bold inland course from Whitby to Thornaby before retreating across Flamborough Head.

...repeated flights scouring shipping lanes...

To the north, Zenit meteorological flights were likely among the tracks detected, while a Heinkel He 111 reconnaissance run pushed within 15 miles of Kinnaird’s Head before turning back.

Cornwall, Devon, and the Bristol Channel saw the heaviest probing, with repeated flights scouring shipping lanes.

RAF fighters scrambled repeatedly, but weather denied them decisive contact.

The day also brought sorrow: Sergeant J.P. Walsh of 616 Squadron was killed in a training accident, his Spitfire spinning fatally from 5,000 feet.

That night, fog again restricted enemy action. Only scattered raids were reported, punctuated by a solitary bombing in Cambridgeshire and a renewed German leaflet drop.


5th August

The return of fine weather on Monday 5th August 1940 brought a surge of German activity over Britain.

With clear skies and only light haze across the Channel, reconnaissance and probing raids resumed in earnest.

Convoys hugging the southeast coast drew particular attention, while RAF Fighter Command remained stretched by a constant pattern of feints and sudden attacks.

Minelaying along the eastern seaboard—from the Wash to the Tay—added to Britain’s growing strain.

Three Spitfire Mk Is (including R6712, YT-N, and R6714, YT-M) of No. 65 Squadron, taking off from Hornchurch, August 1940. In early August 1940, Spitfires played a crucial role in the escalating Battle of Britain. Operating primarily with frontline squadrons such as Nos. 41, 64, 65, and 72, they frequently intercepted German reconnaissance aircraft and escorted bombers over the Channel. Their speed and agility made them formidable opponents against the Bf 109s of Jagdgeschwader 51 and 54. Although losses were sustained, Spitfires scored several confirmed victories, strengthening RAF morale as Luftwaffe activity steadily intensified.

© IWM (HU 54421)  https://battleofbritain1940.com/entry/monday-5-august-1940/

...shadowing a convoy...

At dawn, German formations probed the Straits of Dover.

By 08:00 hours, a Luftwaffe force shadowing a convoy near Hastings drew the response of four RAF squadrons.

No. 65 Squadron’s Spitfires tangled with Bf 109s of I./JG 54, damaging two.

Oblt. Reinhard Seiler claimed a Spitfire, though RAF records suggest only one loss later that morning: Sgt. L.R. Isaac of No. 64 Squadron, whose Spitfire fell into the Channel near Folkestone.

...suffered a bitter loss...

The afternoon saw heavier fighting. Around 14:00 hours, Ju 88s escorted by JG 51 fighters sought Channel targets.

Spitfires of No. 41 Squadron and Hurricanes of No. 151 Squadron rose to meet them.

One Messerschmitt fell to the RAF, but JG 51 pilots, including Hptm. Walter Oesau, struck back.

The unit also suffered a bitter loss: veteran Karl Schmid, credited with ten victories, was killed in action.

...a different menace...

Raids pressed inland. A Hurricane was lost near Dungeness, while other formations attacked convoys off Yarmouth and Blyth.

Isolated bombs fell on Norwich, Brighton, Leighton Buzzard, and Middlesbrough.

Night brought a different menace: extensive minelaying off the east coast, scattered incursions toward London and South Wales, and continued leaflet drops of Hitler’s “Last Appeal to Reason.”

Fighter Command faced a long, tense night after a day of relentless German pressure.


6th August

Tuesday, 6 August 1940 unfolded under low cloud and stiff winds, again muting Luftwaffe efforts.

The day began early, at 05:40 hours, when a lone raider bombed RAF Llandow in South Wales.

Several bombs struck the landing ground, damaging a hangar and two aircraft, though no casualties were reported.

Fog and poor visibility prevented an RAF counter. Along the eastern seaboard, reconnaissance flights probed shipping lanes from Dungeness to Portland.

Nine raids were plotted, most of which turned back without pressing attacks.

Cloud cover shielded the enemy from interception, though Hurricanes of No. 85 Squadron brought a rare success: east of Lowestoft, a Dornier Do 17 of III./KG 3, shadowing a convoy, was destroyed by a section led by Sergeant Geoffrey Allard at around 06:30.

...forcing it to jettison its bombs...

Later, Spitfires of No. 72 Squadron intercepted a Heinkel He 111 off Blyth, forcing it to jettison its bombs before fleeing seaward.

Radar plots during the late afternoon suggested raids forming over the Calais–Boulogne area. Between 18:27 and 18:53, seven enemy formations patrolled the Straits, though none pressed attacks.

Scrambled RAF squadrons made no contact in the cloud.

Accidents claimed several RAF machines: a Spitfire of No. 234 Squadron crash-landed at St Eval; another of No. 72 Squadron was written off at Acklington.

Three Spitfires of No. 616 Squadron returned damaged after an inconclusive fight with a Ju 88.

...insisted that Fighter Command must first be broken...

By nightfall, the Luftwaffe resumed mine-laying along the east and south coasts, with some raids reaching Liverpool Bay.

Two incursions from Norway crossed into Scotland, but poor visibility hampered interception.

At Karinhall, Göring presided over a key meeting on Directive No. 17, rejecting calls to bomb ports or London directly.

He insisted that Fighter Command must first be broken, while unit transfers to Pas de Calais signalled preparations for Adlerangriff.


7th August

Wednesday, 7 August 1940, opened with the Luftwaffe’s attention fixed on convoy reconnaissance and probing attacks.

At 06:35 hours, Hurricanes of No. 46 Squadron sighted bombs falling on a convoy off Cromer.

Fighters from Coltishall scrambled to intercept, but thick cloud between 5,000 and 10,000 feet masked the enemy’s withdrawal.

No ships were lost, yet the incident revealed the growing accuracy of German reconnaissance in pinpointing Channel shipping.

...traced an erratic path...

Further south, raids developed along the coast through the day.

Enemy aircraft appeared near the Isle of Wight, Start Point, and the Lizard Peninsula, while one lone raider traced an erratic path from Bournemouth to Gloucestershire before vanishing at sea.

In the evening, nine aircraft approached the Isle of Wight, only to turn away before fighters from Tangmere and Middle Wallop could close.

Other small formations were tracked off Beachy Head but retreated without contact.

...German patrols lingered...

In Scotland, a force of eleven aircraft advanced to within thirty miles of Aberdeen before vanishing from radar; another single aircraft was plotted near St. Abb’s Head.

These long-range reconnaissance flights underscored the Luftwaffe’s reach but avoided combat.

Meanwhile, small German patrols lingered over northern France, shadowed by RAF fighters across the Dover Straits.

British pilots pressed forward but were met with anti-aircraft fire around Calais, sustaining only light damage.

...stage was set for escalation...

By nightfall, the real gamble was at sea. Convoy CW9, codenamed Peewit, set out through the Dover Straits under Royal Navy escort.

Unknown to the Admiralty, German Freya radar had already fixed its position.

Before dawn on 8th August, E-boats struck, torpedoes scattering the merchantmen in chaos.

Two vessels collided, one sinking, as dawn revealed the convoy broken and vulnerable.

The stage was set for escalation, with Adlerangriff now imminent.


8th August

Thursday, 8th August 1940 opened beneath unsettled skies, but over southern England the air war was shifting into a far bloodier phase.

The tentative raids of July had been a prelude; now the Luftwaffe struck with purpose. Shipping convoys became bait, designed to lure the RAF into combat under German terms.

That morning, attention fixed on Convoy CW9  Peewit, twenty-five coal-laden ships edging along the South Coast.

For Berlin, Peewit was more than merchantmen - it was a chance to force Fighter Command into a costly battle.

For the Admiralty, the convoy symbolised defiance, proof that Britain’s lifelines still held despite enemy boasts of sealing the Channel.

...the most punishing day of the Kanalkampf...

Generalleutnant Wolfram von Richthofen orchestrated the devastating Stuka assaults on Convoy Peewit, demonstrating brutal precision bombing that shattered the convoy, showcasing Luftwaffe power yet foreshadowing heavy losses in the coming Adlerangriff.

https://www.reddit.com/r/Colorization/comments/1k2nsf0/portrait_of_field_marshal_wolfram_von_richthofen/

Generalleutnant Wolfram von Richthofen, commanding Fliegerkorps VIII, issued the order: “This convoy must be wiped out!”

With it, he unleashed his Stuka dive-bombers—Ju 87s from StG 2, StG 3, and StG 77—escorted by Messerschmitt 109s of JG 27 and heavy Bf 110s of LG 1.

More than 300 aircraft would take part in what became the most punishing day of the Kanalkampf.

By dawn, Peewit was betrayed. Detected by German radar and shadowed by E-boats, its position was no secret.

At 08:40 the first blow fell: sixty Stukas screamed down near the Isle of Wight.

The Royal Navy escorts fought back with guns and balloons, while Hurricanes and Spitfires from five squadrons tore into the raiders.

Despite claims of nine enemy aircraft destroyed, two British fighters were lost - and two merchantmen sunk.

...resistance was fierce...

The Luftwaffe then widened the assault. From 11:00, Bf 109s swept across Kent and Sussex, baiting RAF squadrons into dogfights over Ramsgate and Dover.

Losses were heavy on both sides; even a Blenheim on training duty was caught and destroyed in the melee.

At 12:48, the second hammer blow struck.

Nearly sixty Stukas, escorted by fighters and twin-engined 110s, attacked again. Four more ships went down, seven badly damaged.

RAF resistance was fierce - five fighters lost, several German aircraft destroyed - but the convoy bled.

On 8th August 1940, the collier Coquetdale, part of Convoy Peewit, came under relentless Luftwaffe attack in the Channel. Strafed and bombed by Stukas, the vessel was left ablaze and sinking amidst the chaos of scattered merchantmen and Royal Navy escorts. Her crew abandoned ship under fire, many rescued after clinging to wreckage in the water. The destruction of Coquetdale epitomised the vulnerability of Britain’s coastal convoys and the mounting cost of maintaining vital supply lines.

https://maritimearchaeologytrust.org/projects-research/coquetdale/

...sprawling battle raged...

By mid-afternoon, von Richthofen launched his final assault: more than eighty Stukas, protected by sixty-eight 109s.

A sprawling battle raged off Bournemouth. Six RAF fighters fell, but the Luftwaffe lost eighteen confirmed aircraft, including the commander of II./JG 27. Peewit was finished.

Only four of twenty-five ships reached Swanage intact. That night, bombers returned to strike Bristol and mine Britain’s coasts.

By dawn, 8 August was recorded as the costliest day of the Channel battle. Fighter Command had lost twenty-one aircraft; the Luftwaffe at least sixty-six.

For Göring, it was proof that Britain reeled. For Fighter Command, it was survival—bloodied, but unbroken.

The stage was now set for Adlerangriff.

Junkers 87B-2 'Stuka' S2+LM (Wk/Nr 5600) of 4./StG 77 shot down over St Lawrence on the Isle of Wight during an attack on ships of Convoy CW90 'Peewit' on 8 August 1940. Shot down by F/O Peter L Parrott of 145 squadron based at RAF Westhampnett. Unteroffizier Fritz Pittroff-pilot-POW; Unteroffizier Rudolf Schubert-radio/op-killed. 145 Squadron suffered the worst that day, five pilots were killed and their aircraft destroyed. This Stuka was later taken by 49 Maintenance Unit salvage team aboard the Cowes ferry to the mainland and then on to RAF Faygate in Sussex to be dismantled. A local Faygate tale, "....... one of the stories was that the a/c were stripped of useful parts and then pushed into 'a hole in the ground'..."

Photo by courtesy of Andy Saunders https://www.facebook.com/britainatwarmag/


9th August

After the brutal battles of 8 August, the Luftwaffe approached the 9th August with caution.

Poor weather and the need to regroup tempered daylight operations.

Large formations were absent, replaced by probing raids along the east and south coasts, occasional machine-gun strafes, and sporadic attacks on barrage balloons.

Reconnaissance remained a priority, with aircraft shadowing convoys and testing Britain’s defences, while nightfall would bring a far more aggressive assault.

...fleeting enemy activity...

The morning saw fleeting enemy activity over Yorkshire and Norfolk, likely scouting for shipping.

At 11:40 hours, a lone Heinkel He 111H of KG 26 struck Sunderland, dropping fourteen high-explosive bombs on shipyards, railway bridges, Bonners Field, and the Monkwearmouth Station Hotel.

Four civilians were killed, seventy-eight injured, and property badly damaged. Hurricanes from No. 79 Squadron intercepted, forcing the bomber into the sea, where two injured and two unhurt crew were rescued.

Later, another He 111H was lost near Flamborough Head, its crew missing.

...strafed Dover Harbour...

Scattered reconnaissance and test flights continued along the Channel, from the Isle of Wight to Falmouth, Portland, and beyond.

At 16:50 hours, two Bf 109s strafed Dover Harbour, escaping without loss, while four evening raids targeted barrage balloons with no success.

RAF losses were limited, though Sergeant R.D. Ritchie of No. 605 Squadron tragically died when his Hurricane crashed off Dunbar.

...brought renewed intensity...

Night brought renewed intensity.

Around 21:00 hours, raids struck Kent, Plymouth, and Portsmouth, while suspected mine-laying extended from the Thames Estuary to the Wash and north to Aberdeen.

II./KG 27 targeted Filton airfield near Bristol, dropping bombs and leaflets.

One Blenheim of No. 600 Squadron suffered engine failure and was attacked, forcing both crew to bail into the Channel.

Both survived, highlighting the hazards of nocturnal operations.

Friday was a day of contrast: restrained by daylight, yet relentless by night.

The Luftwaffe tested, probed, and pressed, keeping Fighter Command vigilant, while Britain’s skies remained a perilous theatre, where even reconnaissance carried deadly risk.


10th August

Saturday, 10 August 1940 had been selected by the Luftwaffe as the launch date for Adlerangriff - the great aerial offensive against RAF Fighter Command.

Yet poor weather over northern France and southern England forced a postponement.

Instead, the day unfolded in scattered raids, reconnaissance sweeps, and minor attacks that hinted at the battle soon to erupt in full.

...came under strafing fire...

At dawn, German reconnaissance aircraft shadowed convoys off Swanage and the Channel coast.

Shortly after, trawlers off Beachy Head came under strafing fire, while two further raids pressed inland.

At 07:30, a lone Dornier Do 17 crossed near Pevensey and attacked RAF West Malling.

Despite interception by Hurricanes of No. 501 Squadron, the bomber broke through, dropping twelve bombs.

Buildings adjacent to the aerodrome were struck, killing ten civilians. The raid demonstrated how vulnerable inland airfields could be to low-level penetration.

...trawlers were harried...

Maritime reconnaissance continued across the day, with German aircraft reported from Cornwall to Dungeness.

Off Norfolk, trawlers were harried, and a Dornier shadowing a convoy east of Lowestoft was shot down by Hurricanes of No. 85 Squadron.

Further patrols extended as far north as Blyth, where a Heinkel was intercepted but escaped to sea.

By evening, Bf 110 fighter-bombers of Erprobungsgruppe 210 attempted a strike on Norwich, though damage was slight.

...morale remained resilient...

Night brought wider action. Raids consistent with minelaying appeared off the Thames Estuary, Harwich, Plymouth, the Bristol Channel, and the Yorkshire coast.

The most destructive blow came at 23:30, when II./KG 27 bombed Swansea and Bristol, causing damage to railways and docks and killing four civilians.

Further bombs fell across the north-east and scattered rural counties.

Amid this, morale remained resilient. Local “Spitfire Funds” swelled, with communities proudly sponsoring fighters - an emblem of civilian determination as Britain braced for Adlerangriff.


11th August

Although Sunday 11th August was not the official start of Adlerangriff, the Luftwaffe launched over 600 sorties, probing Britain’s defences and targeting coastal installations, shipping convoys, and RAF fighter squadrons.

Early in the morning, formations of Bf 109s and Bf 110s from Erpr.Gr. 210 and III./ZG 26 attacked the Dover Balloon Barrage. Seven balloons were destroyed, fires broke out in the harbour, and nearby buildings sustained damage.

Spitfires from Nos. 64 and 74 Squadrons scrambled to intercept, engaging briefly over the Channel.

The feints successfully drew RAF resources east, weakening defences near Portland.

...Hurricanes and Spitfires engaged fiercely...

Around 10:30, five Luftwaffe raids converged along a twenty-mile front from Portland to Weymouth Bay.

Some 200 aircraft - Ju 88s, He 111s, Bf 110s, and Bf 109s - targeted the Royal Navy dockyard, gasworks, railways, and oil facilities. RAF Hurricanes and Spitfires engaged fiercely.

Fires erupted at the gasworks and oil tanks; railway lines and signal boxes were destroyed; seventeen homes were demolished, one civilian was killed, and twenty-two injured.

The Luftwaffe lost at least twenty-one aircraft, including experienced pilots, while British losses included F/Lt R. Voase-Jeff and other airmen.

...maintained daylight pressure...

Convoys in the Thames Estuary and off Harwich were struck by Bf 110s, Do 17s, and Ju 87s. RAF Hurricanes and Spitfires intercepted, downing several enemy aircraft but losing multiple fighters and crews in the process.

Radar later indicated a potential second raid, abandoned due to worsening weather. Scattered raids appeared off Norfolk, Suffolk, and Yorkshire, with Ju 88s intercepted near Whitby.

RAF squadrons maintained daylight pressure with sorties over Calais and French waters, engaging He 59 floatplanes and JG 51 fighters.

...destroying homes and infrastructure...

Bombing damaged Weymouth and Portland, destroying homes and infrastructure, while night raids struck Bristol, Avonmouth, Liverpool, and inland targets.

Mines were laid off Flamborough Head. Interceptions claimed a He 111 over Bristol, marking the first night victory for No. 10 Group.

The 11th August showcased the Luftwaffe’s tactical evolution and Fighter Command’s resilience.

The day inflicted heavy losses on both sides but foreshadowed the intense battles that would follow in the coming days.


12th August

On the eve of Adlertag, the Luftwaffe unleashed a powerful, coordinated assault across southern England, serving as a full-dress rehearsal for the impending aerial offensive.

Although Göring had set 13 August as the formal start, the operations of 12 August marked a dramatic escalation.

Radar stations, Channel convoys, and RAF airfields all came under precise, concentrated attacks aimed at blinding and destabilising Fighter Command.

...leaving a critical gap...

At 07:20, radar stations along the south-east coast detected a low-flying formation from Calais. Erprobungsgruppe 210, under Hauptmann Rubensdörffer, struck the Chain Home radar network.

Rössiger’s section hit Rye, Lutz’s flight severed Pevensey’s power cable, Hinze bombed Dover, and Rubensdörffer attacked Dunkirk.

Three stations were disabled, leaving a critical gap in the RAF’s early warning system.

The Luftwaffe overestimated their success, believing the network permanently compromised.

German bombers leading a formation with the aircraft in the background known to be was lost in the sea off Portland, Dorset on 12 August 1940. The Luftwaffe suffered so many casualties that Adolf Hitler soon turned his attention to night-time Blitz campaigns of cities like London, Coventry and Liverpool in an effort to try and overcome the brave efforts of the RAF.

https://www.dailymail.co.uk/news/article-8507915/The-girl-13-helped-win-Battle-Britain.html

...engaged in chaotic dogfights...

Before noon, Ju 87 Stukas of IV./Lehrgeschwader 1 attacked convoys Arena and Agent in the Thames Estuary.

RAF Hurricanes and Spitfires engaged in chaotic dogfights.

Four fighters were lost, two pilots killed, and one Stuka shot down.

Despite this, the German bombers inflicted severe damage, igniting fires and scattering lifeboats across the water.

Fifteen Ju 88s under Oberst Fisser struck Ventnor, destroying the radar station and leaving it offline for nearly two weeks.

Fisser was killed, two crew captured.

...Fires raged...

The main force bombed Portsmouth, hitting the naval base, industrial sites, and homes.

Fires raged, and over 100 civilians died. RAF fighters intercepted, downing multiple German aircraft, though many arrived too late.

Attacks hit Manston, Hawkinge, and Lympne, causing extensive damage to hangars, dispersal pens, and stores. RAF pilots, including Geoffrey Page, endured severe injuries but survived.

Despite losses—18 aircraft and 11 airmen—Fighter Command remained operational. By nightfall, most radar stations and airfields were back in use.

The system bent under pressure—but did not break.


Conclusion

The conclusion of the Kanalkampf in late August 1940 left both sides evaluating the brutal cost of the opening phase of the Battle of Britain, and it had a profound effect on the strategy, tactics, and morale for the remainder of the campaign.

For the Luftwaffe, the intense air-sea battles over the English Channel had been intended to clear the way for a full-scale assault on Britain’s air defences.

The Germans had hoped to destroy Fighter Command’s infrastructure, exhaust its pilots, and establish air superiority ahead of Operation Sealion, the planned invasion of the British Isles.

In practice, however, the Kanalkampf revealed significant shortcomings in Luftwaffe planning and execution.

...substantial material damage...

German air operations had inflicted substantial material damage: coastal convoys were battered, ports and shipping facilities suffered repeated attacks, and vital radar installations and forward airfields were temporarily disrupted.

However, the Luftwaffe also incurred heavy losses in aircraft and experienced aircrew, including some of its most skilled pilots.

These losses were not easily replaced, and the attrition rate began to undermine the Germans’ operational momentum.

The Luftwaffe’s initial belief that Britain’s air defences were near collapse proved dangerously optimistic.

Fighter Command, though strained, remained operational, and repair crews quickly restored radar stations and airfields, limiting the strategic gains achieved by the Germans.

...multi-layered defensive tactics...

For the RAF, the Kanalkampf had been a test of endurance and adaptability.

Pilots gained invaluable experience in rapid interception, coordination with radar networks, and multi-layered defensive tactics, which would prove crucial in later phases of the battle.

The engagements over the Channel also highlighted the effectiveness of integrated air-sea intelligence, while the resilience of airfields and repair crews reinforced the British ability to absorb sustained attacks.

Morale across Fighter Command, and among the civilian population, was buoyed by the demonstration that Britain could withstand concentrated Luftwaffe offensives.

...overestimated the disruptive effect...

Strategically, the Kanalkampf marked a turning point in how both sides perceived the conflict.

While the Luftwaffe demonstrated its striking power, it underestimated the tenacity of British defenses and overestimated the disruptive effect of its attacks.

The phase highlighted the limits of bombing as a means to achieve air superiority and underscored the critical role of radar, airfield resilience, and pilot skill.

In sum, while Kanalkampf inflicted damage, its overall effectiveness was limited; it served more as a rehearsal that exposed vulnerabilities and strengths alike, setting the stage for the climactic battles over southern England that would follow in September 1940.


Further reading