The Home Guard was a British organisation in which people outside of the armed forces were assigned to the defence of the country. The force operated during World War II.
In February 1945, a V2 rocket hit Piccadilly. The affected area was evacuated and the Home Guard arrived to patrol it.
George Woods and Clyde Langer intended to warn the home guard of a Nazi group which had landed on the coast. However, they were told by Miss Wyckham that the group themselves were prisoners of another Nazi group. Wyckham herself was a Nazi spy and was lying. The Home Guard later managed to capture and arrest Wyckham and the Nazis. (TV: Lost in Time)