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

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

It will look at why the security service gave false evidence to three courts about conversations with BBC News.

Justice minister Naomi Long has voiced concern that MI5 admitted carrying out surveillance on a former BBC journalist.

MI5 lied to three courts while defending its handling of a misogynistic neo-Nazi state agent who attacked his girlfriend with a machete, the BBC can reveal. Arguing for secrecy, the Security Service ...

The watchdog charged with holding MI5 to account rewrote a report into the handling of a violent neo-Nazi agent after the Security Service gave it false information, the BBC can reveal. An early draft ...

MI5 is facing fresh scrutiny in the case of a violent neo-Nazi agent after a High Court judge said he had "no confidence" in the Security Service's account of how a senior officer gave false evidence.

The home secretary has said MI5 giving false evidence to multiple courts was a "serious failing", as she accepted a further investigation should take place. Yvette Cooper, who is responsible for the ...

The woman at the centre of a case in which MI5 has admitted giving false evidence to three courts says she wants the service to give her a public apology. Beth was attacked with a machete by her ...