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

Some MI5 material relating to its involvement with a teenager who was charged with terrorism before she took her own life is being “withheld” from her inquest but is “not a cause for concern”, a ...

Queen Elizabeth II was kept in the dark for a long time about a major scandal during her reign. Newly released MI5 files reveal that, for nearly 10 years, the late monarch didn’t know that royal ...

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

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

Newly released MI5 files from the National Archives reveal that British intelligence monitored potential connections between ...

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

Avoid facial disguises, carry loose change and be ready to make split-second decisions: just some of the advice Britain’s ...

Queen Elizabeth II was not officially informed for almost a decade that one of her most senior courtiers had confessed to being a Soviet spy, according to newly released MI5 files. Art historian ...

The PSNI has refused to say if MI5 officers were involved in a stop and search of republican mourners returning from the wake ...

Newly declassified British documents show that Queen Elizabeth II wasn’t told details of her long-time art adviser's double life as a Soviet spy because palace officials didn’t want to add to her ...