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The four main agencies are the Secret Intelligence Service (SIS or MI6), the Security Service (MI5), the Government Communications Headquarters (GCHQ) and Defence Intelligence (DI). The agencies are organised under three government departments , the Foreign Office , the Home Office and the Ministry of Defence .
The Secret War Between the Wars: MI5 in the 1920s and the 1930s. Bowyer. ISBN 978-1-84383-938-5.. Read, Anthony, and David Fisher (1984). Colonel Z: The Life and Times of a Master of Spies (London: Hodder and Stoughton 1984). Aldrich, Richard (2000). Intelligence and the War Against Japan Britain, America and the Politics of Secret Service ...
MI5 (Military Intelligence, Section 5), [2] officially the Security Service, is the United Kingdom's domestic counter-intelligence and security agency and is part of its intelligence machinery alongside the Secret Intelligence Service (MI6), Government Communications Headquarters (GCHQ), and Defence Intelligence (DI).
Two MI section-names remain in common use, MI5 and MI6, in most part due to their use in spy fiction and the news media. " MI5 " is used as the short form name of the Security Service , and is included in the agency's logo and web address .
A similar relationship exists in Britain between MI5 and MI6. The distinction, or overlap, between security agencies, national police , and gendarmerie organizations varies by country. For example, in the United States , one organization, the FBI, is a national police, an internal security agency, and a counterintelligence agency.
The international world order is under threat in a way not seen since the Cold War, the heads of MI6 and the CIA have warned.. In the first joint op-ed penned by the leaders of the British and ...
Oleg Penkovsky, a Soviet military intelligence colonel, who was a defector in place, was a joint US-UK espionage operation. Much of Penkovsky's product is available online at the CIA FOIA Reading Room under the code name IRONBARK. [2] A major source of tension between the two countries was Kim Philby, a senior UK SIS officer who was a Soviet ...
Prince William is gearing up for one of London's most anticipated events with a private meeting with MI6, the British Secret Intelligence Service, new reports reveal.. On Thursday, June 13, the ...