Perhaps in an earlier era or in some remote village, this comedy would work, but this story about two mixed-up identities during World War II is comedically outdated. Brian Rix has the dual role of an Air Force officer who is going on an important military mission to France. The brass decide to hoodwink the Germans by finding the officer's double (an idiot latrine-cleaner at an Air Force base) and putting him on a plane to Cairo. As events unfold, the two men get mixed up, and each heads off to the other's destination, giving rise to several absurd tangles. ~ Eleanor Mannikka, Rovi
You are quite correct.
It was in a country hall in NZ in the early 60's that I first saw this film and still remember it with great fondness.
I remember one special line where the person is asked his name and has to spell it out to the clerk. Featherstonehaugh Sir
F E A T H E R S T O N E H A U G H Sir,