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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 Single Intelligence Account (SIA) is the funding vehicle for the three main security and intelligence agencies: the Secret Intelligence Service (SIS/MI6), [44] Government Communications Headquarters (GCHQ) [45] and the Security Service (MI5). [46] Spending on the SIA was £3.6 billion in financial year 2022/23. [47]
The Director of JTAC reports to the Director General of the Security Service (commonly known as MI5), and directs a staff including personnel from the Security Service, Secret Intelligence Service (commonly known as MI6), Government Communications Headquarters (GCHQ), Defence Intelligence Staff, Counter Terrorism Policing and a further six government departments.
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The National Protective Security Authority is the protective security arm of MI5, the counter-intelligence and security agency in the United Kingdom. It is a distinct entity, but benefits from access to MI5’s expertise and understanding of security threats.
MI6 is included as an alias on the Secret Intelligence Service website, though the official abbreviation, SIS, is predominant. While the names remain, the agencies are now responsible to different departments of state, MI5 to the Home Office, and MI6 the Foreign Office.
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. Known as K, he was described in Who's Who as "Commandant, War Department Constabulary". [1]
The committee's statutory remit (under the Justice and Security Act 2013) is to examine the expenditure, administration, policy and operations of the security and intelligence Agencies; the Secret Intelligence Service (MI6), the Security Service (MI5) and Government Communications Headquarters (GCHQ) and Defence Intelligence in the Ministry of Defence, the Office for Security and Counter ...