Married with three daughters and a son, he won a scholarship to read modern history at Magdalen College, Oxford. After gaining a first class degree, his career with MI6 or Secret Intelligence Service (SIS), as it is more formally known, started in 1971. He made his name in the early Eighties, at the height of the Cold war. In one of the most secret and dangerous missions of his career, he was the main case officer for Oleg Gordievsky, the senior KGB officer working as a double agent for Britain while serving at the Soviet Embassy in Kensington.