A lineup of Supermarine Spitfires stands ready at Biggin Hill, part of the 75 Anniversary of the Battle of Britain  Hardest Day

A lineup of Supermarine Spitfires stands ready at Biggin Hill, part of the 75 Anniversary of the Battle of Britain Hardest Day

A lineup of Supermarine Spitfires stands ready at Biggin Hill, part of the 75 Anniversary of the Battle of Britain  Hardest Day

A lineup of Supermarine Spitfires stands ready at Biggin Hill, part of the 75 Anniversary of the Battle of Britain Hardest Day