The United Kingdom has three intelligence and security services, collectively known as the Agencies.
Discover more about the Security Service, also known as MI5 - the United Kingdom’s internal intelligence agency.
The Defence Intelligence Staff is the main provider of strategic Defence Intelligence to the Ministry of Defence and the Armed Forces.
Special Branch was formed in March 1883 to gather, collate, analyse and exploit intelligence.
Find out how Government Communications Headquarters (GCHQ), helps to keep communication and information systems safe from hackers and other threats.
The origins of the Joint Intelligence Committee (JIC) can be traced back to 1936.