Revealing mistake: The B17 that crash lands in the beginning appears quite realistic, until during a head on shot when you can see daylight through the clear nose from a window in the back of the plane. This shows it to be model as in the real plane bulkheads would block this from happening.
Revealing mistake: When C-Cup's nose gets clipped and the guy falls out, it is most obviously a doll/dummy falling out.
Suggested correction: British forces adopted the American phonetic alphabet in 1942.
American forces weren't using "Tango" until 1956. When the British and American forces coordinated calling alphabets in 1943, they used "Tare", not "Tango."
Bishop73