Anyone attending, organising Palestine Action protest will be arrested, Metropolitan Police warns

Defend Our Juries has announced a mass demonstration supporting Palestine Action. The event is planned for Saturday, 31 October, in the vicinity of the US Embassy. Its stated purpose is to show support for the group after its proscription under the Terrorism Act.

The location matters because the Metropolitan Police says officers will be deployed around the embassy. Police have warned that people attending to express support may be arrested. The warning applies even if someone does not hold a placard, depending on their role at the event.

The demonstration is therefore expected to bring a strong police presence and possible arrests. Commander Adam Slonecki said people intending to attend know that supporting a proscribed organisation is unlawful. The police describe the operation as robust and say enforcement will target criminal conduct rather than views alone.

Palestine Action is identified in the article as an activist group. The article does not describe its activities or aims in further detail. It says the group was proscribed in June 2025 under the Terrorism Act, placing it within a legal category whose supporters may face criminal enforcement.

The proscription matters because the Metropolitan Police says expressing support for Palestine Action is an offence. That is why police have warned people about attending the planned demonstration near the US Embassy. The Court of Appeal upheld the proscription in June 2026, according to the police statement.

This legal status shapes the entire policing operation. Commander Adam Slonecki says attendees would be purposefully meeting to commit a crime if they came to support the group. The article therefore presents proscription as the reason support, organising, and logistical assistance may trigger arrest or other enforcement action.

The Metropolitan Police warning covers a wide range of involvement. It includes people who attend the demonstration to support Palestine Action, not only those visibly displaying placards. Police say expressing support for the group is an offence following its proscription.

The warning also targets people who help make the event happen. Commander Adam Slonecki says those officers consider to be playing a key organising role, giving instructions, or providing logistical support will very likely be committing an offence. Such people may face enforcement action.

This makes the stated policing approach broader than simply monitoring signs or speeches. The Metropolitan Police plans a robust operation near the US Embassy and says officers will assess participants’ roles. The article’s practical message is that attendance, leadership, instructions, and support work could all carry arrest risks at this event.

Under the article’s account, proscription gives an organisation a special legal status under the Terrorism Act. Palestine Action was proscribed in June 2025, and the Court of Appeal upheld that decision in June 2026. The article does not set out the full legal process or every restriction created by proscription.

The key mechanism described here is the criminalisation of support. The Metropolitan Police says expressing support for Palestine Action is an offence. It uses that position to warn people against attending a demonstration intended to support the group near the US Embassy.

That status is why the protest has become a policing matter rather than only a public gathering. Officers say they will act against people whose conduct amounts to support, organising, instructions, or logistical assistance. The police frame proscription as the legal boundary governing what participants can do at the event.

The article gives one central legal consequence: the Metropolitan Police says expressing support for Palestine Action is an offence under the Terrorism Act. This follows the group’s proscription in June 2025, which the Court of Appeal upheld in June 2026.

At the planned demonstration, police say that consequence can mean arrest. The warning covers people who attend to support the group, including those who display placards. It also extends to people police believe are key organisers, give instructions, or provide logistical support. The article does not specify fines, prison terms, or other possible penalties.

The immediate practical effect is a high-risk policing operation around the US Embassy. Commander Adam Slonecki says attendees would be purposefully meeting to commit a crime. The Metropolitan Police therefore expects enforcement action against conduct it considers support or meaningful assistance, rather than treating the event as an ordinary demonstration.

Defend Our Juries is the activist group that announced plans for a mass show of support for Palestine Action. Its role is to promote or organise the planned demonstration near the US Embassy. The article does not give further details about the group’s structure or activities.

The Metropolitan Police is responsible for the policing operation. It says officers will be deployed in the embassy’s vicinity and warns that attendees expressing support may be arrested. Commander Adam Slonecki is leading the operation and has explained how police intend to identify possible offences.

The two organisations therefore have opposing roles in the event. Defend Our Juries is announcing the protest, while the Metropolitan Police is warning participants and preparing enforcement. Police say the operation is not about preventing people from expressing views in general, but about acting when expression involves criminality under the stated legal position.

The article presents a tension between public expression and laws restricting support for proscribed organisations. People may generally want to express political views or gather peacefully, but the Metropolitan Police says support for Palestine Action is an offence after its proscription. The article does not provide a court ruling on wider protest rights.

Commander Adam Slonecki says the operation is not about preventing people from expressing their views. He says it is about acting robustly when expressing those views involves criminality. In practice, police warn that placards, attendance, organising, instructions, or logistical support could lead to enforcement.

The immediate consequence is that the planned demonstration faces a substantial police presence and likely arrests. The Court of Appeal has upheld the proscription, so the police say the restriction remains operative. The article gives no further legal challenge or change that would alter the event’s status.