EXCLUSIVE: Experts believe that the threat of islamist extremists remains high, 20 years after the destruction of the 7/7 ...

At the heart of the case is the violent abuse of a woman by a state agent under MI5's control. After the BBC began ...

The High Court has ordered a "robust and independent" new investigation into how MI5 gave false evidence to multiple courts, ...

Senior judges held out the prospect of holding MI5 officers in contempt as they ordered an independent investigation into how ...

A ruling by London's High Court cited the domestic intelligence agency's failure to explain why representatives had ...

The high court has ordered a “robust and independent” investigation into how MI5 gave false evidence to multiple courts after rejecting two official inquiries provided by the security service as ...

Government accepts court ruling on ‘serious failing’ by MI5 - It emerged this year that evidence given by the security agency ...

Ken McCallum, MI5’s director general, said a third of the most threatening plots investigated by his spies involved links to the IS and Al Qaeda or others based overseas.

MI5 could still face contempt of court proceedings following revelations that the intelligence agency provided incorrect ...

A decision on whether to issue contempt of court proceedings over false evidence given to the High Court by an MI5 officer ...

Head of MI5 Ken McCallum has been knighted in the New Year Honours. Sir Ken is made a Knight Commander of the Order of the Bath (KCB) for his more than 25 years of service to UK national security.

MI5 boss Ken McCallum reveals 'staggering' three-fold rise in children investigated for terrorism with online memes drawing them into right-wing ideologies ...