This is the moment that 18 Spitfires and six Hurricanes took part in a re-enactment of the fighting which took place 75 years ago, on the Battle of Britain's "Hardest Day" - watch below.
On August 18 1940, Bromley's Biggin Hill and other military bases in the South East came under attack from the German Luftwaffe, with both sides recording their greatest loss of aircraft during the battle.
The now-historic aircraft are filmed departing Biggin Hill in three waves in a flight in 2015.
The footage is a reminder of the powerful sight of the aircraft in action - filmed years before almost the whole fleet of planes that make up the Battle of Britain Memorial Flight were grounded in August 2017, due to an engine issue.
It was said to include a Lancaster bomber, two Hurricanes and three Spitfires.
Those aircraft, operated by the RAF, are some of Britain's most famous planes and regularly perform displays at air shows up and down the country.
Spitfires and Hurricanes take off from Biggin Hill to mark the anniversary of 'The Hardest Day' of the Battle of Britain
The town is named after RAF Biggin Hill Aerodrome, which played a historic role in the Battle.
Now a commercial airport, during the conflict it hosted the Operations Room for the defence against V-1 flying bombs, or 'doodlebugs' being used on British soil during the Second World War.
An arrangement of air defences were operated, including anti-aircraft guns and fighter aircraft, to intercept the bombs before they reached their targets, as part of the British 'Operation Crossbow'.
Battle of Britain veteran, Squadron Leader Tony Pickering, spoke to Forces TV about his memories of the 'Hardest Day'
The operation also targeted the overseas launch sites and underground V-1 storage depots with strategic bombing missions.
The Spitfires and Hurricanes also flew over the Battle of Britain Memorial at Capel-le-Ferne, on top of the White Cliffs of Dover, on which the names of the almost 3,000 fighter aircrew that flew in the battle are inscribed, as part of the re-enactment.
The special commemoration is honouring all the pilots, engineers, operations staff, ground crews and other military personnel who faced attack that day.