John Brown

John Owen Henry Brown DCM (c. October 1908 – 15 September 1965) was a Quartermaster Sergeant in the Royal Artillery in the British Army, who served in France at the beginning of the Second World War. He was one of Britain's most successful espionage agents as a prisoner of war following his capture by German forces, and, following the war's conclusion, acted as a prosecution witness in trials for treason. -Wikipedia