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

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 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.

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 ...

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

The United Kingdom has seen a 35% rise in the last year in the number of suspects investigated annually for possibly working for a hostile foreign government, the head of the UK’s domestic security ...

MI5 chief highlights alarming trend: a fifth of terror suspects are children under 17. Discover the implications of this ...

Sir Ken admits he's "frustrated when opportunities to prosecute national security threatening activity are not followed" - as a row escalates over the scrapping of a case against two Britons.

Sir Ken McCallum says MI5 has acted against Chinese activity in the last week as parliamentary inquiry launched into spy case ...

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

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.