I read somewhere that during the filming of "The Battle of Britain", the aircraft used constituted effectively the 9th largest air force in the world at the time. Nice factoid, if the case.
Also re the flight of Galland and Stanford-Tuck, I grew up in Namibia in the 1970s, in an area with a strong German heritage, and a number of German expats. There was an ex-services club, open to all who had served in armed forces. The Allied ex-servicemen and their Axis counterparts used to spend hours working out if they'd shot at each other when at the same battles.