Police said on ‌Saturday (April 11, 2026) they had arrested 523 ​people at a protest ⁠in London’s Trafalgar Square opposing Britain’s banning of the Palestine Action ‌group.

London’s Metropolitan Police said in a post on ‌X that people were arrested ‌for ⁠showing support for ⁠a “proscribed organisation”.

The gathering was the first since London’s High Court ruled in February that ​a ban ‌designating the pro-Palestinian group as a terrorist organisation was unlawful. U.K. Interior Minister Shabana Mahmood ‌has been granted approval to ​appeal the ruling.

Lawmakers banned Palestine Action — which ⁠accuses Britain’s government of complicity in what it says are Israeli ‌war crimes in Gaza — under anti-terrorism legislation last July after some members broke into a Royal Air Force base.

Israel has repeatedly denied any ‌abuses in its war in ​Gaza.

During Saturday’s (April 11, 2026) demonstration, placard-holding protesters, some wearing black and ⁠white Palestinian scarves and waving Palestinian flags, ⁠sat on the ground or on camping ‌chairs.