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Tom Marcus is the pseudonym of a British intelligence agency officer of the Security Service (MI5).Marcus is the author of a memoir and two novels. Marcus grew up in the north of England and served as a surveillance officer in the Security Service (known as MI5) before leaving the service in 2013 after being diagnosed with PTSD.
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).
In April 2020, McCallum succeeded Sir Andrew Parker as Director General of MI5. [6] [3]In 2021, McCallum said in his annual threat update that the activities of China, Russia, and other hostile states could have as large an impact on the public as terrorism, marking a significant shift in emphasis for the UK’s domestic spy agency.
The Centre for the Protection of National Infrastructure (CPNI) was formed as a child agency of MI5 in 2007, merging the NISCC and NSAC. [35] CPNI provided integrated (combining information, personnel, and physical) security advice to the businesses and organisations which made up the critical national infrastructure. [ 36 ]
Thames House is an office building in Millbank, London, on the north bank of the River Thames adjacent to Lambeth Bridge.Originally used as offices by Imperial Chemical Industries (ICI), it has served as the headquarters of the United Kingdom's internal Security Service (commonly known as MI5) since December 1994.
Major General Sir Vernon George Waldegrave Kell, KBE, CB (21 November 1873 – 27 March 1942) was a British Army general and the founder and first Director of the British Security Service, otherwise known as MI5.
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 ...
Fifth Column was the name MI5, the British Security Service, gave to a World War II operation run from 1942 until at least 1947.It was initially intended to identify people who would be willing to assist Germany in the event of an invasion of the United Kingdom, but as it developed, it also acted to divert its targets away from harmful activities.