
Several Spitfires will fly over the south east in formations to mark the day
Aircraft including 18 Spitfires and six Hurricanes will fly over south-east England later to mark 75 years since the Battle of Britain's "Hardest Day".
The event will recall 18 August 1940, when Bromley's Biggin Hill and other South East military bases came under attack from the Luftwaffe.
It became known as the "hardest day" as both sides recorded their greatest loss of aircraft during the battle.
The Battle of Britain lasted throughout the summer of 1940.
It was the first major campaign fought entirely in the air.
The Luftwaffe flew 850 sorties, involving 2,200 aircrew, while the RAF resisted with 927 sorties, involving 600 aircrew - the RAF and German Air Force lost 136 aircraft in one day.
http://www.bbc.co.uk/news/uk-england-london-33966632