The UK government has officially raised the national terrorism threat level from “substantial” to “severe” on April 30, 2026, meaning that a terrorist attack is now considered highly likely within the next six months. This is the first time the threat level has been elevated to this degree since February 2022.

The Golders Green Double Stabbing

The immediate catalyst for the upgrade was a double stabbing on Wednesday in Golders Green, north London. Two Jewish men — Shloime Rand, 34, and Moshe Shine, 76 — were seriously injured in the attack, which the Metropolitan Police is treating as a terrorist incident.

The suspect, Essa Suleiman, 45, remains in police custody. Born in Somalia, Suleiman came to the UK as a child in the early 1990s and is a British citizen. Notably, he was referred to the UK’s counter-terrorism “Prevent” strategy in 2020, but the case was closed later that same year.

A Broader Threat Landscape

The government emphasized that the threat level increase was “not solely as a result of the Golders Green attack,” but was also “driven by an increase in broader Islamist and extreme right-wing” threats.

Assistant Commissioner Laurence Taylor, head of the Met’s counter-terrorism unit, told reporters outside New Scotland Yard: “The UK has been experiencing a gradual terrorist threat for some time. Our casework is increasing across a number of ideologies, and within that, we are seeing an elevated threat to Jewish and Israeli individuals and institutions in the UK. We’re also working against an unpredictable global situation that has consequences closer to home, including physical threats by state-linked actors.”

Home Secretary Responds

Home Secretary Shabana Mahmood said the threat level rise “will be a source of concern to many, particularly amongst our Jewish community, who have suffered so much.” She stressed that the government “will do everything in our power to rid society of the evil of antisemitism” and announced increased funding for policing and security around Jewish sites.

A Pattern of Escalating Antisemitic Incidents

The Golders Green attack is the latest in a string of incidents targeting the UK’s Jewish community in recent months:

• October 2025: A car ramming and stabbing attack outside a Manchester synagogue killed two Jewish people and left three others in serious condition.
• March 2026: Four charity-owned Hatzola ambulances belonging to a Jewish organization were set on fire in a synagogue car park in Golders Green.
• Recent weeks: The Finchley Reform Synagogue in north London was attacked, and days later, a bottle containing accelerant was thrown through the window of Kenton United Synagogue.

The UK’s Terrorism Threat Level System

The UK operates a five-tier terrorism threat level system:

• Critical: An attack is highly likely in the near future
• Severe: An attack is highly likely (current level)
• Substantial: An attack is strongly possible (previous level)
• Moderate: An attack is possible
• Low: An attack is unlikely

The last time the UK was at the “severe” level was in November 2021, following a bomb detonation outside Liverpool Women’s Hospital and the murder of MP Sir David Amess. The level was lowered to “substantial” in February 2022.

Security Response

Assistant Commissioner Taylor confirmed that police will be reviewing security measures for “all events across the country.” With the ongoing US-Israeli conflict with Iran, UK security services have warned that “an unpredictable global situation” is creating domestic consequences.

The threat level upgrade marks a significant shift in the UK’s security posture and reflects growing counter-terrorism pressures amid escalating global geopolitical tensions.

Sources: BBC News