London police arrest 139 as hundreds protest Palestine Action ban

London police arrested at least 139 people at a protest against the proscription of Palestine Action, which is classified as a “terrorist” organisation under UK law. Hundreds gathered outside the US embassy on Saturday to oppose the ban, which took effect in July 2025. Police said most arrests were for expressing support for a proscribed organisation. Labour MP John McDonnell argued that protesting the government’s decision does not automatically amount to supporting the group; a Supreme Court appeal is due on Wednesday.