Flying Officer Percy Charles Pickard, the unflappable pilot who smokes a pipe, was killed with his navigator (who does not appear in this film), in the famous Mosquito raid on Amiens Prison later in the war, by which time he had been promoted to Wing Commander. The second pilot was played by Gordon Woollatt (who survived the war).
In order not to give away information to the enemy, RAF Mildenhall took the fictional name of Millerton Aerodrome.
Many of the aircrew appearing in this film were to die in action during the Second World War.
Percy Charles Pickard, who was the bomber pilot in this film, was the brother-in-law of actor Sir Cedric Hardwicke and was killed leading the Amiens raid, Operation Jericho, in 1944.
The Equipment Officer was played by John Cobb. Cobb was a successful racing driver. He returned to racing after the war. He died attempting to break the water speed record when he crashed in Loch Ness.