MI5

Man guilty of plotting to kill PM

MI5 to share information on terror suspects

What will MI5 data sharing achieve? Video, 00:01:24What will MI5 data sharing achieve?

MI5 boss condemns 'malign' Russian actions

The vetting files: How the BBC kept out ‘subversives’

What next for Russia’s spy networks?

Police call for 'counter-terror citizens'

Russian links examined in up to 14 deaths

Poisoning poses major challenge for MI6

Secret order on MI5 law-breaking revealed

Northern Ireland terror threat lowered

John Simpson: How I became a honeytrap target. Video, 00:04:08John Simpson: How I became a honeytrap target

What does Brexit mean for Britain's spies?

MI5 warnings on Brexit, terror and Russia

Manchester attack 'could have been stopped'

Profumo 'had relationship with Nazi spy'

Security blocks to be placed at minster

MI5 boss warns of 'intense’ terror threat

MI5: 'Over 3,000 extremists in UK' Video, 00:02:32MI5: 'Over 3,000 extremists in UK'

MI5 'evolving to match terror threat' Video, 00:01:30MI5 'evolving to match terror threat'

UK 'faces Islamist threat for decades'

Ex-MI5 boss: UK faces Islamist threat for decades. Audio, 00:01:04Ex-MI5 boss: UK faces Islamist threat for decades

Inside the sting that caught four jihadis