The Defector is the untold account of how, in 1971, the defection of a KGB saboteur in London led to the expulsion of more than a hundred Soviet ‘diplomats’ from the UK. Drawing on newly declassified intelligence documents and dozens of interviews with spymasters, The Defector tells a startling story of a Soviet mission to plant fake Kremlin agents within British and American intelligence services, the paranoia that ensued, and how the actions of a genuine turncoat, the former KGB officer Oleg L