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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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MI5 only works inside the UK.

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Latest News

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MI5 commemorates VE Day 75

Like the rest of the country, MI5 pays tribute to the service and sacrifice of the entire Second World War generation

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MI5 headquarters lights up blue for carers

The Thames House entrance archway lit up blue on Thursday 16 April alongside other UK landmarks to show our...

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