Britain’s Court of Appeal has delivered a decisive victory to the Home Office, ruling that the proscription of Palestine Action as a terrorist organisation is lawful. In a rare sitting of five judges led by the Lady Chief Justice of England and Wales, the court on Monday overturned a February High Court judgment that had found the ban unlawfully interfered with freedom of expression. The panel concluded that the group’s activities—which have included breaking into military bases and vandalising factories linked to Israel’s largest defence firm, Elbit Systems—could not be described as non-violent, and that the home secretary’s decision was a justified and proportionate response.

The legal battle began in July 2025, when the Labour government formally added Palestine Action to the list of proscribed organisations under the Terrorism Act 2000, placing it alongside groups such as Al-Qaida and the Islamic State. The move made membership or support a criminal offence punishable by up to 14 years in prison. The group’s co-founder, Huda Ammori, immediately challenged the ban, and in February a three-judge High Court panel ruled that the proscription was unlawful, arguing it disproportionately curtailed legitimate protest rights. The government appealed, and Monday’s ruling by the Court of Appeal definitively reverses that decision, with the chief justice stating that portraying Palestine Action as a non-violent civil disobedience movement was “not a sustainable proposition.”

Viewed from London, the ruling reinforces the government’s expansive interpretation of national security powers, a stance that has drawn both support and sharp criticism. European legal analysts note that the case tests the boundaries between counterterrorism legislation and the right to protest, with some warning that the precedent could embolden further restrictions on activist groups. In the Middle East, Israeli perspectives have welcomed the decision as a necessary curb on what they describe as targeted harassment of defence industries, while Palestinian solidarity networks across the region condemn it as a criminalisation of anti-occupation advocacy.

The ruling coincided with a heavy police presence outside the Royal Courts of Justice, where more than a hundred protesters were arrested on suspicion of supporting a proscribed group. Demonstrators carried signs declaring “I support Palestine Action” as officers carried them away. The arrests came just a day after a separate protest in London against a “Great Israeli Real Estate Event” selling land in the occupied West Bank, which resulted in at least 14 arrests and drew condemnation from Mayor Sadiq Khan. These parallel events underscore the deepening tensions in Britain over activism linked to the Israeli-Palestinian conflict.

Looking ahead, the judgment is likely to embolden the Home Office in its use of proscription powers, while Palestine Action has signalled it will continue to challenge the ban through all available legal avenues. With over 3,000 supporters already arrested since the initial ban, the ruling cements a legal framework that treats direct-action tactics targeting defence infrastructure as terrorism, a development that will be closely watched by civil liberties advocates and governments across Europe and beyond.