London police arrested 48 people on Saturday at a protest by Palestine Action supporters outside the US Embassy, days before a two-day Supreme Court hearing on the ban on the group, according to Middle East Eye.

“The majority of arrests have been for expressing support for a proscribed organisation,” the force said. Nearly 4,000 people have been arrested for allegedly showing support for Palestine Action since the British government proscribed it under anti-terrorism laws in July 2025.