Hitler’s threatened British Invasion 1940

Supermarine Spitfire Mark Is of No. 610 Squadron based at Biggin Hill, flying in ‘vic’ formation, 24 July 1940.
THE SECOND WORLD WAR 1939 – 1945: THE BATTLE OF BRITAIN JULY-SEPTEMBER 1940. © IWM (CH 740) IWM Non Commercial Licence

Supermarine Spitfire Mark IAs, (N3289 ‘DW-K and R6595 ‘DW-O’ nearest), of No 610 Squadron, Royal Air Force based at Biggin Hill, Kent, flying in three ‘vic’ formations.