To report an imminent threat call 999 or ring the Anti-Terrorist Hotline on 0800 789 321
Current UK threat level: SEVERE Read more about threat levels >>

Introduction

“MI5 investigates threats to national security through the gathering of secret intelligence and by working closely with other organisations and government departments. We do this within a strict framework of legislation and oversight to ensure our investigative powers are only used where it is necessary and proportionate to do so.”

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Latest News

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MI5 wins LGBT British Employer of the Year

MI5 has been named Employer of the Year at the 2018 British LGBT Awards.

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MI5 named in The Times Top 50 Employers for Women 2018

MI5 has been named in The Times Top 50 Employers for Women 2018. The alphabetical and unranked list celebrates UK...

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