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" ...

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

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

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: ...

But the document has been declassified and is on show in a new exhibition focusing on the work of MI5 due to open at the National Archives, in west London, in the spring. However, far from the ...