Supermarine Spitfires along the White Cliffs of Dover during the Battle of Britain at the start of September 1940. The aircraft depicted here are from No 41 Squadron, newly transferred south to RAF Hornchurch in Essex, north of the Thames estuary - part of Fighter Command's 11 Group, covering London and the South-East of England. Flying the nearest, EB-G, pilot Eric Lock is about to begin an outstanding series of aerial victories.