Some interesting snippets about that photo from “Yank in the RAF”. This sequence was actually filmed at Prestwick (in 1941 I think). The filming was mentioned in a book ,possibly one by the late Johnnie Johnston. I believe this bit of film was shot silently and (incorrect) sounds effects of a squadron af AT-6s taking off was dubbed in later.

This whole sequence (complete with wrong sound effects) has since cropped up in umpteen documentaries,purporting to be genuine footage of the Battle of Britain.

Colin

I recall reading about this very recently (although not the bit about the wrong sound effects) while reading up on the Eagle Squadrons. Will have a look when I get home.