Only the Carry Ons could get away with using a wooden gate in Snowdonia as the farthest flung outpost of the British Empire. Originally to be called Carry On the Regiment, this is rightly regarded as one of the best in the series. Affectionately mocking Hollywood's Raj adventures, Talbot Rothwell's script is stuffed with ludicrous names, classic one-liners and memorable moments, none better than the dinner party under fire, which provides Peter Butterworth with his finest hour. Kenneth Williams is superb as the Khasi of Kalabar, but it's Sid James and Joan Sims who steal the show as the Ruff-Diamonds.

Sir Sidney Ruff-Diamond looks after the British outpost near the Khybar pass. Protected by the kilted Third Foot and Mouth regiment, you would think they were safe, but the Khazi of Kalabar has other ideas—he wants all the British dead. But his troops fear the 'skirted-devils, who are rumoured not to wear any underwear.