More than 20 people have been arrested in London after a protest in support of the banned group Palestine Action, the Metropolitan Police has said. Pictures from the demonstration showed a small group holding placards reading "I oppose genocide, I support Palestine Action" in Westminster.

The protest group was officially classified as a terrorist organisation from midnight on Saturday after the measure received overwhelming support from MPs and following the failure of a last-minute legal challenge to delay it.

The UK government will, for the first time, legally redefine a non-violent protest group, Palestine Action, as a terrorist organization after a last-minute legal challenge to suspend the group’s ban under anti-terrorism laws failed at a high court on Friday.