The Security Service
Thames House Millbank London SW1P 4PN
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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.
In an era of technological change, we must constantly innovate to protect the country from harm. MI5 expects all staff to uphold the Rule of Law and maintain the highest standards of integrity. Working closely with GCHQ, SIS and the police, we protect
https://www.mi5.gov.uk/