Continuity mistake: About 30 minutes away from the end, Brother Belcher can be seen walking past the gates. Then, when he's 1 yard away from the gates just to make sure it's all clear for him to go, he gets a bullet that flies out of nowhere. When the bullet hits his hat, the hat shoots upward and out of shot. In the wide shot of all the gates and the walls, there is no sign of his hat.
Trivia: The Khyber Pass is actually Snowdonia in Wales. All of the rest of the production was filmed at Pinewood Studios in London.
Sir Sidney Ruff-Diamond: Tell Major Shorthouse to call me an elephant.
Lady Joan Ruff-Diamond: He needn't bother I'll do it. You're an elephant.