About 1,000 police officers set up barriers between the dueling protests near the Houses of Parliament. Some far-right protesters battled with the police after trying to breach the barriers. The Metropolitan Police said that its officers had been assaulted and struck by bottles and that it had brought in reinforcements on horses to keep the crowd back. Video shared by the Metropolitan Police showed protesters skirmishing with officers, who said they had arrested nine people by 5 p.m. Some carried placards calling for the deportation of asylum seekers who cross the English Channel in small boats.