Target for Tonight (1941)
Superb docudrama from the IWM via the Crown Film Unit and one that is reckoned to be one of the best of its type, showing a bombing raid on an oil storage facility with Wellington bombers piloted by the original crews and everyone else in the film are genuine RAF people - there are no actors, everyone from Commander-in-Chief to LAC were in the RAF. In fact, it seems the pilot of the main featured aircraft "F for Freddie" died a year later in another raid flying a Mosquito.
I notice also that the fictitious (for security reasons of course) airfield of Millerton Aerodrome was actually RAF Mildenhall, where as it happens my father was stationed in 1945, where he was demobbed after 27 years in the RAF and where I spent my early childhood, which I still have fond memories of, when it was 50% an American base.
I had to smile at one bit of trivia on the IMDb, that states "The American release was re-dubbed to overcome the problems of unintelligible accents", and yes, those clipped English "tallyho" accents do sound strange even to me - my Dad never spoke like that!
One other thing, the film poster shows what looks like three modified Spitfires, which didn't feature in the film at all! You'd think someone would have noticed this at the time!!
Well worth a look.