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 ...

Sir Ken McCallum, Director General of MI5, said the security service routinely uncovered plots to carry out surveillance, sabotage, arson or acts of physical violence in the UK ...

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

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

The MI5 chief accused Moscow, Tehran and Beijing of continuing to undermine the UK’s national security through espionage, cyberattacks and intimidation campaigns.

The intelligence agency warned MPs and their staff to look out for spies trying to elicit information from them by blackmail or phishing attacks.

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 ...

LONDON (Reuters) -Britain's domestic spy agency MI5 issued a rare public warning to members of parliament on Monday that they are being targeted by spies from China, Russia and Iran in an attempt to ...

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.

Security Service chief Sir Ken McCallum said the ‘more hostile world’ had forced the biggest shift in MI5’s mission since ...

The head of MI5 says he will "never back off" from confronting threats from China as he revealed his officers disrupted a case linked to Beijing in just the past week. More broadly, Sir Ken McCallum ...