Britain's national terrorism threat level was raised to 'severe' on Thursday, indicating that a terrorist attack is highly likely. The Joint Terrorism Analysis Centre (JTAC) made the decision, marking the first such elevation since 2022.

The 'severe' rating, the second-highest of five levels, means an attack could occur at any time. JTAC assesses threats independently from MI5, police, and other agencies. Officials cited an increased danger from Islamist extremists, extreme right-wing individuals and groups, and state-linked actors encouraging violence within the UK.

The change followed a stabbing attack on Wednesday in Golders Green, north London, where two men aged 34 and 76 were injured. Essa Suleiman, 45, was arrested at the scene and charged with two counts of attempted murder. Police classified the incident as terrorism-related. Suleiman had previously been referred to the Prevent deradicalization program in 2020, though his case was closed.

This was not the sole factor. Broader concerns include recent arson incidents and a pattern of attacks linked to ideological motivations. The threat level was last at 'severe' in November 2021 after the murder of MP David Amess; it was lowered to 'substantial' in February 2022.

Home Secretary Shabana Mahmood announced additional security measures, including £25 million in new funding to bolster protections at community sites, schools, and places of worship. This brings the total investment to £58 million for the year. The funds will support more police patrols, Project Servator deployments to identify suspicious behavior, and enhanced safeguards.

Prime Minister Keir Starmer visited the area to meet first responders. He emphasized the need for vigilance amid rising risks. New legislation is planned to grant the Home Secretary powers to proscribe additional organizations posing threats.

Metropolitan Police Commissioner Sir Mark Rowley highlighted elevated risks to various targets. Counter-terrorism head Laurence Taylor advised the public to remain 'alert, not alarmed' and report concerns via 999 or the anti-terror hotline. Extra armed patrols have been deployed in London.

Authorities are monitoring upcoming events, such as a planned march on May 16, for potential risks. The MI5 website now lists the threat as 'severe', urging heightened awareness across the country.