Fenella Fielding wore the same, now iconic, red dress for the entire five weeks of filming. There were no doubles or replacements.
At 97 minutes, this is the longest "Carry On" film.
Production took five weeks and the budget was £179,000.
This was the last "Carry On" film distributed by Anglo-Amalgamated. Stuart Levy had died and his partner Nat Cohen made it known that the "Carry Ons" were too low-brow, as he wanted to move upmarket, even though the films had been extremely profitable for the company. Rank took over distribution.
Harry H. Corbett replaced Sidney James. James was committed to appearing as one of the robbers in the pantomime "Babes in the Wood" at the London Palladium, which ran until June 1966, and Corbett was drafted to replace him. Despite this, his character name, Sidney Bung, was kept. Sidney James' characters on TV and film were very often also called Sid, his real-life nickname.