Protesters simultaneously unveiled signs with the same message "I oppose genocide. I support Palestine Action" in Westminster's Parliament Square.

London's Metropolitan Police arrested more than 466 people at a protest on Saturday against Britain's decision to ban the group Palestine Action, the force said. British lawmakers banned Palestine Action under anti-terrorism legislation in July after some of its members broke into a Royal Air Force base and damaged planes as part of a series of protests.

The Metropolitan Police have issued a stern warning to anyone planning on attending a Palestine Action protest in London this coming weekend, stating their intention to make mass arrests. This comes weeks after the British government proscribed the network as a terrorist group,