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MI17, or Military Intelligence, section 17, was the secretariat to the other departments of the British Directorate of Military Intelligence. The section has been disbanded long since.^[when?]

v t e United Kingdom intelligence agencies
Domestic intelligence	Security Service (MI5) National Protective Security Authority National Crime Agency (NCA) National Ballistics Intelligence Service (NBIS) National Fraud Intelligence Bureau Metropolitan Police Specialist Operations Counter Terrorism Command National Domestic Extremism and Disorder Intelligence Unit National Counter Terrorism Policing Network
Foreign intelligence	Secret Intelligence Service (MI6)
Military intelligence	Defence Intelligence (DI) Defence Intelligence Fusion Centre Joint Intelligence Training Group Intelligence Corps Joint Support Group 1st Intelligence, Surveillance and Reconnaissance Brigade RAF Intelligence 30 Commando Information Exploitation Group
Signals intelligence	Government Communications Headquarters (GCHQ) National Cyber Security Centre
Intelligence assessment	Joint Intelligence Organisation (JIO) Joint Terrorism Analysis Centre (JTAC)
Policy and Coordination	Joint Intelligence Committee (JIC) National Security Council National Security Adviser Cabinet Office Home Office Office for Security and Counter-Terrorism Foreign, Commonwealth and Development Office Ministry of Defence Chiefs of Staff Committee Strategic Command Single Intelligence Account National Security Strategy
Review and Oversight	Intelligence and Security Committee of Parliament Independent Reviewer of Terrorism Legislation Investigatory Powers Tribunal Investigatory Powers Commissioner
Historical agencies	Directorate of Military Intelligence MI1 MI2 MI3 MI4 MI7 MI8 MI9 MI10 MI11 MI12 MI14 MI15 MI16 MI17 MI19 Naval Intelligence Department Naval Intelligence Division Room 40 No. 30 Commando Special Operations Executive (SOE) Diplomatic Wireless Service Far East Combined Bureau Force Research Unit Special Reconnaissance Unit Military Reaction Force