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The Joint Terrorism Analysis Centre UTAC) is responsible for determining the threat level
posed to the UK by international terrorism. If you happen to come across or hear
anything that may be related to terrorist activity, it is crucial to trust your instincts and
contact the anti-terrorist hotline at 0800 789 321.
These threat levels serve as a general indicator of the probability of a terrorist attack:
• LOW indicates that the likelihood of an attack is extremely low.
• MODERATE suggests that an attack is possible but not particularly likely.
• SUBSTANTIAL implies that there is a credible chance of an attack occurring.
• SEVERE signifies a high likelihood of an impending attack.
• CRITICAL indicates that an attack is highly likely to occur in the very near future.