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.

George Formby was an English actor, singer-songwriter and comedian who became known to a worldwide audience through his films of the 1930s and 1940s. On stage, screen and record he sang light, comic songs, usually playing the ukulele or banjolele, and became the UK's highest-paid entertainer.