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Russia & Iran on 'mission to cause mayhem' in UK as spies foil 43 terror plots

Giving a rare public update on the threats facing the country, MI5 boss Ken McCallum said his officers had caught dozens of plotters planning mass murder using bombs and guns.

ITV reveals brand new gripping thriller with Endeavour star leading cast lineup

Teen who 'took own life' after being groomed by extremists was spied on by MI5

‘Spy in the Bag’ death mystery ‘stinks of MI6 cover-up’ insists ex-agent

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Bungling spies & undercover cops made 250 blunders while snooping on suspects

Security experts warn of a terror threat risk to the UK

Britain's terror threat 'highest since 9/11' as insider warns of 'real risk'

Twist in Body in Bag case as court hears claim 'murder' victim 'created Bitcoin'

Undercover cop Mark Kennedy had a six-year relationship with a woman he was spying on

ULTIMATE BETRAYAL

I had relationship with man of my dreams - but he was SPYING on me

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Families of victims killed in Manchester Arena terror attack to sue MI5

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MI5 must learn from its mistakes — and ensure they are never repeated

British Embassy guard who sold secrets to Russia snared in MI5 sting