The UK faces a range of threats from terrorism, espionage and state threats. Understanding the threats facing your business or organisation will ensure protective security measures are proportionate, effective and responsive.
To report an imminent threat call 999 or ring the police Anti-Terrorist Hotline on 0800 789 321.
If you know something about a threat to national security such as terrorism or espionage, contact MI5 online via their website or call:
- Freephone 0800 111 4645
- 020 7930 9000 (standard call rates apply)
- +44 20 7930 9000 (international calls only)

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Terrorist groups use violence and threats of violence to publicise their causes and as a means to achieve their goals.

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The UK is a high priority espionage target. Many countries actively seek UK information and material to advance their own agendas.

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The UK faces other serious international and domestic threats, including organised crime and the proliferation of weapons of mass destruction.

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Information and advice on the most concerning and relevant threat scenarios currently facing UK government and industry.