At the heart of the case is the violent abuse of a woman by a state agent under MI5's control. After the BBC began ...

MI5 is facing fresh scrutiny in the case of a violent neo-Nazi agent after a High Court judge said he had "no confidence" in the Security Service's account of how a senior officer gave false evidence.

MI5 is in serious trouble – and has failed to learn from past scandals. The secret service faces serious questions after it lied to a court about how it dealt with a neo-Nazi spy.

Rookie wartime MI5 "watchers" were advised they needed to be prepared to offer a big tip if they had to tell a taxi driver to ...

SPY chiefs probed a suspected “Russian double agent” at the heart of MI6 in a 20-year global operation, it has been revealed. An investigation launched into the alleged mole, dubbed ...

For the first time on camera, spies working for MI5 have spoken to ITV News and ITV's Tonight programme to reveal the reality of the secret work they do to keep the UK safe.

Two of the Cambridge spies, Donald Maclean and Guy Burgess, fled to Russia in 1951. A third, Kim Philby, continued to work for foreign intelligence agency MI6 despite falling under suspicion.

MI5 Spy Chief Says Russia and Iran Are Behind a 'Staggering' Rise in Deadly Plots LONDON (AP) — Britain is facing a “staggering rise” in attempts at assassination, sabotage and other crimes ...

He said the domestic MI5 spy agency, whose officers he questioned during private hearings, had failed to act swiftly enough.

MI5 spy chief says Russia and Iran are behind a 'staggering' rise in deadly plots Ken McCallum, director general of MI5, delivers the annual director general's speech in west London on Tuesday.

LONDON (AP) — Britain is facing a "staggering rise" in assassination attempts on U.K. soil by Russia and Iran, as the hostile states recruit criminals to "do their dirty work" for them, the head ...