Terrorism and threat levels

Reporting suspected terrorism

If you suspect someone is involved in terrorism in any way, you should report it to people who can help.

You can:

  • call 999 in an emergency
  • call the police counter-terrorism hotline on 0800 789 321
  • contact the Security Service (MI5) directly through their website

You can remain anonymous and you may save lives.

Threat levels

There are 5 levels of threat, which are set by the MI5 and the Joint Terrorism Analysis Centre. The level they set is based on information gathered by intelligence services and the police about known or suspected terrorist plots.

Current threat levels and what they mean

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