The UK government officially proscribed Iran's Islamic Revolutionary Guard Corps (IRGC) as a national security threat on Friday, July 13 [3].

This designation marks a significant escalation in the UK's legal approach to Iranian state-linked entities. By outlawing the organization, the British government aims to dismantle the IRGC's capacity to conduct operations within its borders, specifically targeting activities that threaten public safety.

Prime Minister Keir Starmer said the IRGC is proscribed over "threats to life and intimidation on UK soil."

Under the new measures, providing public support or assistance to the IRGC is now a criminal offense. Individuals found guilty of such support face a maximum prison term of 14 years [1]. The government's decision follows findings that the IRGC was involved in antisemitic attacks and intimidation efforts throughout the country [5].

Starmer said the penalties for more severe actions are significantly higher. He said, "Anyone carrying out acts of sabotage on behalf of the IRGC faces life imprisonment" [2].

While the IRGC had previously been subject to British sanctions, this formal proscription as a national security threat creates new legal avenues for prosecution. The move targets the group's ability to operate covertly in London and other cities, effectively criminalizing the act of belonging to or supporting the organization [1, 4].

Government statements said that the designation was necessary to protect the public from the group's activities [3]. The measures apply to all forms of assistance, whether financial, material, or public advocacy.

"Anyone carrying out acts of sabotage on behalf of the IRGC faces life imprisonment."

This move shifts the UK's strategy from economic pressure via sanctions to active criminalization of IRGC membership and support. By designating the IRGC as a national security threat, the British government is signaling a zero-tolerance policy toward foreign state-sponsored intimidation and antisemitic violence on its soil, likely tightening surveillance and legal crackdowns on Iranian intelligence networks operating in Europe.