UK terrorism threat level
Assessed by an AI model against this signal's rubric. Describes conditions; not a forecast or advice.
AlertStableThreat level: Severe
UK terrorism threat level raised to Severe: an attack is highly likely
Why it's at this level
The UK national terrorism threat level remains Severe, meaning an attack is highly likely, after MI5 raised it in October 2026. The MI5 Director General warned on 13 Oct of a rising threat from anti-migrant and anti-Muslim extremism alongside Islamist terrorism. No change as of 1 Nov.
What this means for you
Stay alert in crowded places and report anything suspicious via gov.uk/ACT or 999 in an emergency. Follow police and MI5 guidance.
Why it matters
The official MI5 assessment of the likelihood of a terrorist attack in the UK.
What moves it
Intelligence assessment by JTAC.
Status at each of the last 2 checks
How it's rated
Alert
Severe or Critical.
Watch
Substantial.
Normal
Low or Moderate.