More than 400 people are expected to gather outside the United States embassy in London on October 31 in the latest act of mass defiance against the British government’s ban on the Palestine Action group.

Protesters plan to hold placards reading: “I oppose genocide. I support Palestine Action,” and campaign group Defend Our Juries said a parallel action will take place outside the US consulate in Edinburgh, Scotland.

More than 3,850 people have been arrested for publicly backing Palestine Action since the United Kingdom’s government proscribed it as a “terrorist” organisation in July 2025, Defend Our Juries said.

The timing of the demonstrations is calculated. In June, the Court of Appeal sided with the government and overturned a High Court ruling that had found the proscription unlawful.

On November 4 and 5, the UK Supreme Court will hear an appeal by Palestine Action cofounder Huda Ammori. ‘Arrested again and again’Among those Al Jazeera spoke to at the group’s previous action outside Westminster Magistrates’ Court was Teresa, a former teacher-turned-activist who has been arrested multiple times for protesting against the proscription. “It’s a badge of honour to be able to do this for Gaza” she told Al Jazeera.

She is not alone. Those arrested at recent actions include Massive Attack’s Rob del Naja, 94-year-old human rights barrister Margaret Owen, former government adviser Jonathan Porritt and the Reverend Sue Parfitt. Why the US embassy?

Organisers want to raise the possibility that the UK move to ban Palestine Action came under pressure from US President Donald Trump.

The proscription followed an incident in which activists spray-painted Trump’s Turnberry golf course in Scotland. The US president labelled the action “terrorism” on his Truth Social platform and praised then-Prime Minister Keir Starmer’s response.

During the legal challenge, it emerged that Trump and Starmer had spoken by phone twice about Palestine Action in March 2025. Starmer had requested updates from Police Scotland on the arrests and briefed Trump on developments.

The US president’s son Eric Trump also met Scottish First Minister John Swinney before the ban was announced, and documents released under the Freedom of Information Act showed the Turnberry protest was discussed.

The Halloween protests will also come three days after a hearing in the trial of the Turnberry protesters at the High Court in Glasgow. Prosecutors are now seeking to have the seven defendants sentenced as “terrorists”, a move critics called “completely disproportionate”.

The same week that the prosecutors made that call, Washington designated Palestine Action a “terrorist organisation”.

Defend Our Juries said the resulting sanctions have blocked Ammori from crowdfunding for her Supreme Court challenge.

Police officers grab a sign held by a Palestine Action campaigner during a protest outside the Labour Party’s annual conference in Liverpool [File: Temilade Adelaja/Reuters] Growing opposition This week, actors Paul Mescal, Jessie Buckley and Susan Sarandon along with broadcaster Gary Lineker signed a letter published on the cover of the New Statesman magazine urging Prime Minister Andy Burnham’s government to drop the “draconian” legislation.

Campaigners said the ban on the group has also in effect halted UK sales of books by the Irish novelist Sally Rooney, a Palestine Action supporter.

However, when author Sarah Helm, wife of National Security Adviser Jonathan Powell, publicly declared her support for Palestine Action, the Metropolitan Police took no action. Defend Our Juries said that exposes a ban that cannot be enforced evenly. Shami Chakrabarti, a senior figure in the ruling Labour Party, has urged the home secretary to lift the ban.

Speaking to the LBC radio station, the former shadow attorney general said it “makes a mockery” of counterterrorism law and the power to proscribe should be exceptional and kept under constant review. “I’d better be careful what I say, or I’ll be arrested,” she added.

The government’s case The government argued that Palestine Action’s campaign of break-ins and criminal damage at defence sites, including those linked to Israeli arms maker Elbit Systems, meets the legal threshold for proscription. The Court of Appeal described it as a covert organisation operating through secret cells. Defend Our Juries insisted its own protests are entirely peaceful.

“This mass defiance and the mass arrests expected to follow will lay bare the fundamental rights to free expression at stake in the Supreme Court hearing just days later,” a spokesperson said.