In an annual speech, Ken McCallum says the security service is operating in "a new era" with terrorism remaining an "ever-present threat".

Slow Horses season 5 concluded with one of the most intense and surprising episodes of the series to date, ultimately seeing ...

The head of Britain’s domestic intelligence agency says China poses a daily threat to the United Kingdom’s security.

MI5 has offered an “unreserved” apology to the High Court saying there had been “failings and errors” in legal proceedings related to an alleged source accused of abusing two women. An injunction was ...

Slow Horses Season 5 ending explained as the finale wraps up the London Rules chapter. The episode reveals secrets about ...

MI5 disrupted a plot from China against the UK as recently as last week, the spy agency’s head, Ken McCallum, said, as he expressed frustration at the collapse of a trial of two alleged spies.

LONDON — Britain is facing a “staggering rise” in attempts at assassination, sabotage and other crimes on its soil by Russia and Iran as the two states recruit criminals to “do their dirty work,” the ...

Slow Horses Season 5 has upped the stakes with a terrorist plot revolving around the mayoral campaign in London.

LONDON -- Stella Rimington, the first female chief of Britain's MI5 intelligence agency and later a successful thriller writer, has died, her family said Monday. She was 90. The first woman to head a ...

Security Service director general Sir Ken McCallum said the potential risk from artificial intelligence could not be ignored.

The suspected Huntingdon train knifeman was “not known to counter-terrorism police, the security services or the Prevent ...

Director General of MI5, the UK's Security Service, Ken McCallum, delivers the annual Director General's Speech at Thames House, the headquarters of the UK's Security Service in London on Thursday Oct ...