The Security Service, commonly known as MI5 (Military Intelligence, Section 5), [2] is the United Kingdom's domestic counter-intelligence and security agency and is part of its intelligence …

Discover how MI5 works to protect against threats to national security through intelligence gathering techniques, partnerships and legislation. Find out how you can play your part in …

Dec 10, 2025 · MI5, intelligence agency charged with internal security and domestic counterintelligence activities of the United Kingdom. It is authorized to investigate any person …

The Security Service, MI5, is responsible for protecting the UK against threats to national security. MI5 works with the Home Office .

6 days ago · The Security Service, universally known as MI5, stands as Britain's domestic counterintelligence and security agency, operating in the shadows to protect - British History, …

MI5 is directed by the Joint Intelligence Committee (JIC), and the service is bound by the Security Service Act 1989. The service is directed to protect British parliamentary democracy and …

Dec 20, 2025 · Concerns are raised over whether the MI5 can be trusted to provide full evidence to courts and investigations following the findings of Operation Kenova. The final report of …

Apr 4, 2025 · Headquartered in Thames House, MI5, formally known as the Security Service, is a linchpin of the UK’s intelligence community and is globally recognized for its vital role in …

Apr 1, 2025 · Britain's domestic spy agency MI5 issued a rare public warning to members of parliament on Monday that they are being targeted by spies from China, Russia and Iran in an …

An appeal for information has been sent to all MI5 staff over false evidence the service gave to three courts in a neo-Nazi spy case. MI5's regulator is investigating how it came to make false ...