Battle of Britain Day is 15 September and commemorates a turning point in the Battle of Britain, one of the most pivotal events of the Second World War. The battle spanned four months, but on 15 September 1940, as the German Luftwaffe attempted an assault on British defences, the RAF deployed tactical squadrons to great effect and inflicted heavy losses on the German forces.
RAF Fighter Command claimed this battle as a decisive victory over the German Luftwaffe, and today, in 2026, we mark its 86th anniversary. Annual services are held at Westminster Abbey alongside a flypast of three RAF Spitfires and one Hurricane.
Battle of Britain Day summary
| What is it? | The commemoration of the RAF claiming a pivotal victory over German forces during the Second World War. |
| When is it? | 15 September |
| Where is it marked? | At Westminster Abbey on Battle of Britain Sunday. |
| How is it marked? | With an annual service at Westminster Abbey and flypasts of three Spitfires and one Hurricane. |
| Why does it matter? | Battle of Britain Day remembers those who bravely defended the country in the largest air battle the world has ever seen. |
What was the Battle of Britain?
The Battle of Britain was, and still is, the largest air battle in history. After capturing France in a little over a month (46 days), Hitler wanted to invade Britain and destroy its famous and feared RAF. The battle was mainly in the air, with Spitfires and Hurricanes defending the country from German forces.
It lasted several months and claimed many lives. The Germans, freshly equipped with an air force after Hitler broke the Treaty of Versailles, believed they were better equipped and more skilled than their British enemy; this was incorrect, as four months after the battle began, Hitler ended the campaign as his losses kept accumulating.
The entire battle had a devastating impact on both sides. Members of both sides were killed and injured, whilst thousands of civilians lost their lives or suffered minor or major injuries.
When was the Battle of Britain?
The Battle of Britain started on 10 July 1940, but the main Luftwaffe assault didn’t begin until 13 August.This aerial conflict continued until 31 October, when Hitler signalled his pilots to retreat.
Why did the Battle of Britain happen?
The Battle of Britain happened after France fell and Dunkirk was evacuated; Hitler saw Britain as his next target. He wanted a quick end to the conflict and, after initially believing Britain would seek peace with Germany, he met a stiff resolve that led him to seek military options. Codenamed “Operation Sea Lion,” the invasion of Britain started to take shape.
The only way it would work would be for the RAF to be silenced. Control of the skies over Southern England would give Hitler an easier route into Great Britain, and by removing the threat of the RAF, he believed Operation Sea Lion would be successful. A sustained air assault was what the German forces felt was necessary, but they met resilience, bravery and skill they didn’t anticipate.
How did the RAF win the Battle of Britain?
The RAF won the Battle of Britain through smart planning and generally out-witting the Luftwaffe. At the time, the German air force was the largest in the world. After being completely stripped of an air force after World War One, the Nazis reinstated it, and by 1940, it was formidable. It had already suffered losses in the Battle of France, but was fully prepared to attack Britain.
However, the RAF was also suitably prepared. It had the world’s first integrated air defence network and two of the most famous fighter planes of all time. Combine this with the pilots’ skills and bravery, and it was a more than equal challenger to German bombers.
The Dowding system
The Dowding System was the world’s first integrated air defence network. It was named after Sir Hugh Dowding, the Commander-in-Chief of RAF Fighter Command. The system joined radar stations, ground defences, the Observer Corps, fighter squadrons and more into one unified defence system. This meant that a response to a raid could be actioned within minutes.
The RAF organised the defence of the country into four geographical areas divided into sectors, controlled from a sector station.
- Coastal radar warned of incoming aircraft early
- Observer Corps tracked raids once they crossed the coast
- Fighter Command HQ relayed the information to Sector Stations
- Fighters were scrambled and directed by radio to defend the skies
This enabled an efficient process where vast amounts of information could be relayed quickly and appropriate action taken when necessary. This meant planes were not sent off on a whim; it was calculated information, sending them exactly where they needed to be when they needed to be there.
The Spitfire and Hurricane
The Supermarine Spitfire and Hawker Hurricane are widely recognised as two of the greatest fighter planes of all time. The Hurricane downed the most enemy aircraft, but the fast, agile Spitfire played a crucial role in eliminating the German fighter escorts, greatly reducing the effectiveness of the German attack.
Multiple teams worked around the clock to keep planes in the sky, with engineers, armourers and more working long hours in high-pressure environments to repair damaged planes and motivate each other when morale was low.
“The few”
“The few” references the speech given by Winston Churchill when he told Parliament in August 1940 that, “Never was so much owed by so many to so few.” Despite the RAF being largely British, Fighter Command was an international force. Pilots from New Zealand, Australia, France, Poland, Zimbabwe (then Rhodesia) and Czechoslovakia all helped to defend the country and halt Hitler’s offensive.
“The few” extended way beyond pilots and engineers. Women from the WAAF operated Radar and plotted raids; anti-aircraft gunners and searchlight crews defended the skies from the ground, and thousands of volunteers manned observation posts day and night. Whilst “the few” is largely attributed to the pilots, a vast network stood behind them and helped Britain secure victory.
What happened on 15 September 1940?
15 September was when the Luftwaffe attempted a massive assault on Britain’s defences. With the tactical squadrons, streamlined communication, skilled pilots and world-class aircraft, the Germans suffered heavy losses. This impressive display by the RAF saw Fighter Command claim this as a decisive victory; from then on, it became known as Battle of Britain Day.
The human cost of the Battle of Britain
The human cost of the Battle of Britain was significant. Over 2,500 German airmen lost their lives, while Allied forces lost more than 1,500 airmen.
Many others from both sides were also seriously injured, with loss of limbs, burns, bullet wounds and PTSD all reported among German and British forces.
Casualties were not limited to those serving their country. The bombing raids of the Luftwaffe led to an estimated 23,000 civilian deaths in densely populated areas like London and Liverpool. In addition, more than 30,000 people were wounded as a result of these bombing campaigns.
Douglas Bader
The story of Douglas Bader serves as an inspiration to many. He was one of the most famous pilots in the RAF and shot down numerous German aircraft, preventing them from causing damage to civilian and tactical locations. His story stands out more than some others because he lost both of his legs before the war started. Formerly a pilot, he retrained with the aid of artificial legs and helped his country claim victory in a devastating aerial campaign.
How is the Battle of Britain commemorated today?
Today, the Battle of Britain is commemorated with an annual service at Westminster Abbey on Battle of Britain Sunday. This is the Sunday nearest to the 15th. (In 2025, it was 21 September) This time of remembrance is combined with a flypast of three RAF Spitfires and one Hurricane.
The day is also remembered in Canada, with the third Sunday in September marked to commemorate the bravery of the fallen and those who contributed to the war effort.
Why is Battle of Britain Day still remembered?
Battle of Britain Day is still remembered because it marks a moment when British forces stood firm and refused to back down to an aggressor. The victory did not win the Second World War, but it kept Britain in a position to defend itself and help other Allied nations defeat the evil Nazi regime.
If the RAF hadn’t succeeded, it could be argued that the shape of the war may have been totally different.
The day is largely acknowledged for remembering the men and women who protected the country. Without their skill, camaraderie, bravery and determination, the nation’s future may have been somewhat different.
The injuries and loss endured in 1940 remind us that service can cost someone everything. Protecting today’s service personnel, veterans and their families is at the heart of what we do. We provide insurance for armed forces personnel and veterans. From life cover to military kit insurance, and from buildings insurance to travel cover, we provide tailored policies for your circumstances. If we can make life a little easier in or out of the uniform, contact us today on 01243 817777 or request a call back for your own tailored quote.
Battle of Britain Day FAQs
When is Battle of Britain Day?
Battle of Britain Day is marked every year on 15 September. 2026 marks its 86th anniversary. The date commemorates when RAF Fighter Command inflicted heavy losses on the German air forces.
When did the Battle of Britain start?
The Battle of Britain officially began on 10 July 1940, when the Luftwaffe started to attack British shipping and coastal targets in the English Channel. The main German assault that targeted airfields and communications began on 13 August.
When was the Battle of Britain?
The Battle of Britain was fought from 10 July to 31October 1940. It was, and still is, the largest sustained air battle the world has ever seen.
Why is 18th August known as “The Hardest Day”?
18th August is known as “The Hardest Day” because it was when both sides suffered their heaviest aircraft losses. Records indicate that around 100 German and 136 British aircraft were shot down or damaged in 24 hours.
How is Battle of Britain Day commemorated?
Battle of Britain Day is commemorated with an annual service at Westminster Abbey on Battle of Britain Sunday, the closest Sunday to 15 September, with a flypast of three RAF Spitfires and one Hurricane. Smaller, local remembrance services or events also take place to honour the airmen who defended the country.