Overview
- Judges found the proscription disproportionate, saying only a very small number of the group’s activities met the legal definition of terrorism and that general criminal law remains available for such acts.
- The listing remains temporarily in force to allow for potential appeal, so expressing support or membership continues to be a serious criminal offence carrying sentences of up to 14 years.
- Home Secretary Shabana Mahmood said she is disappointed by the ruling and will seek to challenge it in the Court of Appeal.
- Police reported 1,630 related arrests up to September 2025, while campaigners cite roughly 2,700 or more, and the Metropolitan Police now plan to prioritise evidence-gathering over immediate arrests pending the court’s next step.
- Freedom of information data shows the Home Office incurred £694,390.03 in legal costs, and the original ban followed a June 2025 break‑in at RAF Brize Norton in which two aircraft were damaged.