Trivia

The machines in the Num Yum factory are a spoof on the Moloch scenes from Fritz Lang's film Metropolis.

Liz Fraser recounted many years later how Peter Sellers desperately tried unsuccessfully to seduce her during production of this film. Despite this, they still remained on good terms and would work together several more times in the future.

Two of the shop stewards in the movie, brothers Tony Comer and John Comer, got the roles after winning a talent show as a comedy double act, "The Comer Brothers". The prize was one thousand pounds sterling and a movie contract with The Boulting Brothers. John Comer went onto a successful TV acting career but Tony quit showbusiness and returned to factory work.

Ian Carmichael was thirty-eight, playing a twenty-three year-old.

When Prime Minister Harold Macmillan visited Queen Elizabeth II at Balmoral Castle in September 1959 to ask for a General Election, he was treated to a private showing of this film.