People holding signs sit during a rally organised by Defend Our Juries, challenging the British government’s proscription of “Palestine Action” under anti-terrorism laws, in Parliament Square, in London, Britain, August 9, 2025. Photo: REUTERS/Jaimi Joy

London’s Metropolitan Police said on Saturday it had arrested 150 people at a protest against Britain’s decision to ban the group Palestine Action, adding it was making further arrests.

Officers made arrests after crowds, waving placards expressing support for the group, gathered in Parliament Square, the force said on X.

Protesters, some wearing black and white Palestinian scarves, chanted “shame on you” and “hands off Gaza,” and held signs such as “I oppose genocide. I support Palestine Action,” video taken by Reuters at the scene showed.

In July, British lawmakers banned Palestine Action under anti-terrorism legislation after some of its members broke into a Royal Air Force base and damaged planes in protest against Britain’s support for Israel.

The ban makes it a crime to be a member of the group, carrying a maximum sentence of 14 years in prison.

The co-founder of Palestine Action, Huda Ammori, last week won a bid to bring a legal challenge against the ban.