Christopher Andrew is Professor of Modern and Contemporary History and former Chair of the Faculty of History at Cambridge University. He is also chair of the British Intelligence Study Group, Founding Co-Editor of Intelligence and National Security, former Visiting Professor at Harvard, Toronto and the Australian National University, and a regular presenter of BBC Radio and TV documentaries. His most recent book, The Defence of the Realm: The Authorized History of MI5, was a major international bestseller. His fifteen previous books include The Mitrokhin Archive volumes 1 and 2, and a number of path-breaking studies on the use and abuse of secret intelligence in modern history. Less