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

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

The booklet is among various newly-declassified records set to go on display in a groundbreaking exhibition showcasing MI5’s ...

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

Historian and exhibition curator Mark Dunton speaks about special files that will form part of a special exhibition at the National Archives titled 'MI5: Official Secrets', featuring case files ...

Though many apply, only a few have the skills and patience to make it as a “watcher”, an MI5 training manual published for the first time by the National Archives reveals. Despite the rise in ...

Film star Dirk Bogarde was warned by MI5 that he could be the target of a gay “entrapment” attempt by the KGB, according to newly-declassified intelligence files. Documents released to the National ...

Papers released by MI5 show that although Blunt confessed to them he had spied for the Russians during World War Two, the late queen herself was not officially told for nearly nine years.

The guidance is contained in a booklet for recruits during World War Two, which will go on display at the National Archives in Kew, west London Rookie wartime MI5 "watchers" were advised they ...

Some of the newly released documents will feature in the forthcoming exhibition at the National Archives. The Director General of MI5, Sir Ken McCallum, said: "While much of our work must remain ...

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