The former head of the British Intelligence service and author Stella Rimington was the first female (and publicly-named) MI5 ...

Declassified records describe Hans Wilsdorf as “most objectionable” and allege he may have used his position to spread ...

She was credited as the inspiration for Judi Dench’s M in James Bond films and was the first publicly named chief of Britain’s domestic intelligence service.

Iran’s Islamic Revolutionary Guards Corps (IRGC) should be banned as a terrorist organisation, nearly three quarters of ...

MI5 Director General Ken McCallum said his agents and police have tackled 20 “potentially lethal” plots backed by Iran since 2022 and warned that it could expand its targets in the U.K. if ...

Witness B - MI5's third-in-command - said the internal investigation established that Officer 2 had "updated colleagues within MI5" about the conversations with me, but that "there was no evidence ...

MI5 officers could have had the chance to stop suicide bomber Salman Abedi at the Manchester Airport days before the massacre if they had discussed the information earlier, said John Saunders, a ...

Retired judge John Saunders, who led the inquiry into the Manchester Arena attack, said that one MI5 officer admitted they considered intelligence about suicide bomber Salman Abedi to be a ...

MI5 missed chance to stop attack at Ariana Grande concert, inquiry finds Tributes in Manchester, England, on May 23, 2017, after a suicide bombing at an Ariana Grande concert in the northwestern city.

For 10 years MI5 have been knowingly breaking the rules and failing to report it, and the government has failed to investigate clear red flags," says Liberty lawyer Megan Goulding.

The threat means that MI5 is running seven times as many investigations into Chinese activity as it was four years ago, while the FBI is opening roughly two new counterintelligence investigations ...

The head of MI5 has issued an unprecedented warning that terrorists are seeking to recruit children over the summer holidays after record arrests of teenagers.