At least 25 people were arrested on Saturday after far-right protesters in an anti-immigrant rally clashed with police in London. More than 100,000 people joined the far-right march, while 5,000 demonstrators attended the "Stand Up To Racism" rally. According to a statement by the police, more than 1,600 officers have been deployed as part of the overall public order policing operation, including 500 brought in from other forces.