Leonard Frank Burt (11 February 1932–24 November 2010) was a British policeman known for his involvement in Operation Countryman and his discovery of the Portland spy ring.
[1][2] In 1959, Burt discovered that Harry Houghton, a worker at the Admiralty Underwater Weapons Establishment, was living beyond his means.
Burt investigated Houghton and reported him to MI5, leading eventually to the unravelling of the Portland spy ring.
[1] In 1978, Burt, together with Dorset Chief Constable Arthur Hambleton, headed Operation Countryman, an investigation into corruption in the Metropolitan Police Force.
[4] Burt ended his career as assistant chief constable of the Dorset police force, and died in 2010.