Introduction to the Security Service

MI5's mission is to keep the country safe. For more than a century we have worked to protect the UK from a range of threats, whether it be from terrorism or hostile activity by states.

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As part of the Integrated Review Refresh, the government has announced the creation of the National Protective Security...

A statement from MI5 Director General Ken McCallum following the publication of the third volume of the Manchester...

Fact or Fiction

MI5 once used Wormwood Scrubs prison as our headquarters
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