John Henry Gerrard CBE MC KStJ QPM (25 November 1920 – 2 June 2003) was a British police officer with the London Metropolitan Police. Gerrard was the son of Archie Reginald Gerrard and his wife Evelyn. He was educated at Cordwainers' Technical College and enlisted in the British Army in 1939, serving in Iceland from 1940 to 1942. On 20 March 1943, he was commissioned as a second lieutenant in the Middlesex Regiment and served with the 1st Battalion until he was demobilised with the rank of captain in 1946. He was awarded the Military Cross (MC) as a lieutenant on 1 March 1945 for gallantry in North-West Europe.