Some MI5 material relating to its involvement with a teenager who was charged with terrorism before taking her own life is ...

Documents newly declassified by MI5, Britain's internal intelligence agency, show the late Queen Elizabeth II was not ...

A closer look at recently declassified MI5 files on the intelligence failure surrounding the five "Cambrdige spies" ...

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 "follow that cab" when pursuing a suspect, newly declassified documents ...

Do not use false beards, carry plenty of spare change for the tube, and if you have to tell a taxi driver to “follow that cab”, be prepared to give him a big tip. That was the advice issued to rookie ...

A defendant in an alleged Russian spy ring case told police he had already spoken to MI5 when he was arrested, the Old Bailey ...

Jonathan Hall KC warned that football hooligans and criminal gangs could technically be classed as terrorists under Sir ...

The documents, on display in the National Archives in Kew, West London, suggest the organisation was keen to dismiss any fantasies about the glamour of espionage.

Newly released MI5 files reveal that, for nearly 10 years, the late monarch didn’t know that royal household member Anthony Blunt was actually a Soviet double agent. According to the BBC ...

A World War II-era guide to tailing a target, and files on notorious double agents such as Kim Philby, feature in MI5: ...

MI5 feared film star Dirk Bogarde could be the target of a KGB gay "entrapment" attempt after it emerged he was on a list of 'six practising British homosexuals' passed to the Russians ...

Queen Elizabeth II wasn’t told details of her long-time art adviser’s double life as a Soviet spy because palace officials ...