Other mistake: The fight at the end is unintentionally quite funny for the lack of enthusiasm shown by the extras playing the Burpers. They engage the British soldiers with some half-hearted fighting that's little more than jostling, and when they disengage the fight supposedly in fear and panic at seeing the "Men in Skirts" reveal themselves, most of them are quite slow and calm as they try and get through the narrow gate to escape.
Carry On Up the Khyber (1968)
1 other mistake - chronological order
Directed by: Gerald Thomas
Starring: Kenneth Williams, Sid James, Charles Hawtrey, Sidney James, Roy Castle
Continuity mistake: During the battle towards the end of the film, Sir Sidney Ruff-Diamond tells Captain Keene to line up his men and you can see that the collar on Keene's uniform is fastened. In the next shot, Keene is fastening up his collar again.
Brother Belcher: Don't worry - we'll save you some Strawberry Mousse.
More trivia for Carry On Up the Khyber