Revealing mistake: When the tail breaks off of the "German" machine and it careens around the field, you can see the little steerable tail wheel used to control the plane in those scenes. In all other scenes this plane has a tail skid.
Those Magnificent Men in Their Flying Machines (1965)
1 revealing mistake
Directed by: Ken Annakin
Starring: James Fox, Sarah Miles, Stuart Whitman, Alberto Sordi
Continuity mistake: When the German colonel crash lands in the Channel, he first hangs directly under his upside-down plane before he has to let go, and the plane zooms in a straight line away from him. But as he resurfaces in the foreground, the plane comes in from the background's left before landing in the water.
Count Emilio Ponticelli: Like-a Caesar, we go to England.
Trivia: The sequence where the aeroplane lands on a train was shot on the Bedford-Hitchin railway line, which was closed in 1964.