What British intelligence officer worked as a double agent for the Soviet Union and was recruited by Arnold Deutsch?
Arnold Deutsch Arnold Deutsch (1903–1942?), variously described as Austrian, Czech or Hungarian, was an academic who worked as a Soviet spy, best known for having recruited Kim Philby. Much of his life remains unknown or disputed.
MI1 MI1 or British "Military Intelligence, Section 1" was a department of the British Directorate of Military Intelligence, part of the War Office. It was set up during World War I. It contained "C&C", which was responsible for code breaking.