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Intelligence and Security Committee of Parliament
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MI6 (Secret Intelligence Service)
Government Communications Headquarters
Defence Intelligence (Ministry of Defence)
Joint Intelligence Organisation (Cabinet Office)
National Security Secretariat (Cabinet Office)
Homeland Security Group (Home Office)
Investigatory Powers Commissioner's Office
Investigatory Powers Tribunal
Independent Reviewer of Terrorism Legislation
Investigatory Powers Act 2016
Justice and Security Act 2013
Regulation of Investigatory Powers Act 2000
Intelligence Services Act 1994
Security Service Act 1989