Spare a Copper is a 1940 British black-and-white musical comedy war film directed by John Paddy Carstairs and starring George Formby, Dorothy Hyson and Bernard Lee. It was produced by Associated Talking Pictures. It is also known as Call a Cop. The film features the songs, "I'm the Ukulele Man", "On the Beat", "I Wish I Was Back on the Farm" and "I'm Shy". Beryl Reid makes her film debut in an uncredited role, while Ronald Shiner appears similarly uncredited, in the role of the Piano Mover and Tuner.

Plot

Formby plays a bumbling War Reserve police officer called George Carter who aspires to become a member of the flying squad. The film is set in Merseyside where the battleship HMS Hercules is being built. A group of saboteurs are planning to blow it up. George manages to foil them. One of the saboteurs, called "Jake", is played by Bernard Lee.