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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).
The Defence of the Realm: The Authorized History of MI5, published in the United States as Defend the Realm, is an authorised history of the British Security Service (MI5), written by historian Christopher Andrew. Andrew was commissioned in December 2002 to write the history for MI5's 100th anniversary in 2009.
It is a distinct entity, but benefits from access to MI5’s expertise and understanding of security threats. [ 1 ] NPSA helps organisations within the United Kingdom understand the range of security threats they face, for example from terrorism, espionage, and state actors, and importantly what they can do to minimise their risk through how ...
Security Intelligence Far East (SIFE) was a British intelligence organization created in 1946 as the Far Eastern regional headquarters of the Security Service, MI5.It was based in British-controlled Singapore and established by Colonel Cyril Egerton Dixon, a career MI5 officer with a great deal of war time counter intelligence experience in Britain and India.
Thomas Argyll Robertson OBE (27 October 1909 – 10 May 1994), known as "Tommy" or by his initials as "TAR", was a Scottish MI5 intelligence officer responsible during the Second World War for the "Double-Cross" ("XX") disinformation campaign against the German intelligence services.
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The Director General of the Security Service is the head of the Security Service (commonly known as MI5), the United Kingdom's internal counter-intelligence and security agency. The Director General is assisted by a Deputy Director General and an Assistant Director General, and reports to the Home Secretary , although the Security Service is ...
He was appointed Deputy Director General of MI5 in April 2017. [2] He described his early career as: "I spent my twenties mostly trying to recruit terrorists inside terrorist organisations to work as secret agents [to keep] the rest of us safe." [4] In 2018, McCallum took charge of the MI5 response to the attempted assassination of Sergei ...