Documentary released to coincide with the 65th anniversary of one of the most important battles in history. Isolated after the defeat of France and the retreat from Dunkirk, Britain's only line of defence against a planned German invasion were the Spitfires and Hurricanes of the RAF. From July to September 1940, the Luftwaffe attempted to shatter the RAF's resolve, launching their last bid to defeat the British pilots on 15th September, when the Germans flew over 1000 sorties in a single day. Defeated in the heavy fighting on that day, the Germans switched their tactics to start the bombing raids against London, and cancelled their invasion plans. Featuring previously unseen footage from the 1968 feature 'The Battle of Britain', as well as dramatised re-enactments and the latest in CGI technology, the documentary commemorates this momentous period in British military history.