Police have warned that people attending a planned demonstration in support of Palestine Action outside the United States Embassy in London could face arrest. Officers are due to be deployed in the vicinity of the embassy for the gathering on Saturday 31 October.
The warning also extended to people whom officers consider to be organising the event, giving instructions or providing logistical support. Police said those people could face enforcement action. That remains a prospective policing assessment, not a judicial finding about the conduct of any individual.
As of 05:05 UTC on Saturday 31 October 2026, the demonstration was still a planned event. No arrest, charge, injury, disorder or unlawful act at the gathering had been established. The police announcement concerned deployment and possible enforcement, rather than action already taken at the protest.
Plans for the embassy gathering
The organisers’ event page described a mass sign-holding action outside the embassy on 31 October, with an action time of 1pm. Supporters were reported before the event to be planning to hold placards expressing support for Palestine Action.
A separate official alert from a foreign diplomatic mission listed a Lift the Ban protest in support of Palestine Action at the United States Embassy London. It gave a planned window of 12.30pm to 7pm and described expected attendance as several hundred.
Campaigners were reported to be expecting more than 400 people. That figure is a pre-event expectation, not a confirmed attendance total. The organisers’ stated action time and the wider window in the diplomatic alert both concern plans for the gathering, rather than a record of when it took place.
The organisers also announced a parallel event outside the United States Consulate in Edinburgh. The police deployment described for London concerns the vicinity of the embassy, where the planned demonstration creates a public-safety issue centred on a diplomatic site and the possibility of enforcement.
Proscription and the pending appeal
The statutory Order adding Palestine Action to the list of proscribed organisations was made on 4 July 2025 and came into force on 5 July 2025. It applies to the organisation using that name based in the United Kingdom.
The law provides several distinct offences connected with proscribed organisations. These include inviting support and arranging or managing a meeting with a specified supportive or facilitative purpose. A separate provision concerns wearing, carrying or displaying an article in a public place in circumstances that arouse reasonable suspicion that a person is a member or supporter.
For that public-display provision, the way or circumstances in which an article is displayed and the question of reasonable suspicion are central to the statutory wording. The pre-event warning alone does not determine whether the provision applies to particular conduct, including the display of a particular placard.
The distinction matters for both attendees and those involved in organising the action. A warning that enforcement is possible is not a finding that an offence has occurred, nor does it settle how the separate legal provisions would apply to an individual’s actions.
On 15 June 2026, the Court of Appeal allowed the government’s appeal against an earlier decision that had quashed the proscription decision. The appellate court held that the decision was not unlawful and set aside the quashing order.
A Supreme Court case page listed a full hearing for 4 and 5 November 2026 on whether the decision to proscribe Palestine Action under section 3 of the Terrorism Act 2000 was lawful. That hearing remained pending at the time of the police warning; the appeal had not been resolved.
