Alertes de sécurité

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03 nov. 2020 | 17h42 UTC

UK: National terrorism threat level increased to severe November 3

United Kingdom Alerte de sécurité

Authorities increase UK terrorism threat level to severe on November 3 following recent European attacks; exercise increased vigilance

TIMEFRAME expected from 3/11/2020, 12h00 until 6/11/2020, 11h59 (Europe/London). COUNTRY/REGION United Kingdom


The UK Home Secretary Priti Patel announced on Tuesday, November 3, that the country's terrorism threat level has been increased to severe from the previous level of substantial. Severe is the fourth highest level on the UK's five-tier terrorism threat level scale, indicating that an attack is highly likely. The assessment by the government's Joint Terrorism Analysis Centre (JTAC), was reportedly not made in response to any specific threat but as a precautionary measure following recent terrorism incidents in mainland Europe, including several low-level attacks in France and shootings in the Austrian capital Vienna on Monday, November 2.

Increased security measures and deployments are likely around some sensitive sites in response to the increased terrorism threat level, including airports and other major transport hubs.


The UK's terrorism threat level is set by the multi-agency Joint Terrorism Analysis Centre (JTAC), with a separate warning system for Northern Ireland-related and domestic terrorism being set by the security service, MI5. The threat level ranges from 'low', indicating that an attack is highly unlikely, to 'critical', meaning that an attack is highly likely in the near future.

The threat level for international terrorism has had remained at severe for more than five years from August 2014 until it was reduced to substantial in November 2019. However, the level has twice been briefly raised to critical in May and September 2017 following major terrorism incidents in the UK.

The threat from Northern Ireland-related terrorism remains at severe.


Those in the UK are advised to exercise an increased level of vigilance in light of the terrorism threat and should immediately report any suspicious items or activity to police.


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