It focuses on MI5, the UK’s domestic counterintelligence ... been depicted as putting their fingers on the trigger of their ...

The late Queen was not officially told that one of her senior courtiers was a Russian spy for almost a decade after he confessed, secret MI5 files reveal today. The newly declassified papers tell ...

Avoid facial disguises, carry loose change and be ready to make split-second decisions: just some of the advice Britain’s domestic spy agency gave recruits tailing subjects nearly a century ago.

However, a Second World War guide produced by MI5 for prospective agents concluded that the ideal “watcher” was “born and not made”. The 17-page guide, which was compiled for “officers ...

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 ...