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.

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

Some MI5 material relating to its involvement with a teenager who was charged with terrorism before taking her own life is being "withheld" from her inquest but is "not a cause for concern", a hearing ...

Britain might already be at war with Russia, a former MI5 chief has warned, pointing to the rising number of cyber attacks as well as sabotage and covert operations on UK soil. At such a critical ...

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 withheld critical information from the home secretary when it applied for warrants to gather telephone and internet data, Britain’s most secret court has heard. The security service is accused of ...

On the latest episode of Queens, Kings and Dastardly Things, Robert Hardman and Kate Williams chart the life of Sir Anthony Blunt, whom Williams brands Britain's 'ultimate traitor.' Blunt, a distant ...

The security service MI5 has handled large amounts of personal data in an "undoubtedly unlawful" way, a watchdog has said. The Investigatory Powers Commissioner said information gathered under ...

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

Privacy campaigner and Cambridge University's Head of Cryptography Professor Ross J Anderson has suggested one way to begin stamping out the British state's ...