Police have urged hundreds of protesters to immediately leave an anti-vaccine, anti-lockdown protest in Trafalgar Square or face arrest. The warning came after heated clashes between demonstrators and officers during a “Resist And Act For Freedom” rally on Saturday afternoon. Dozens of officers, including some on horseback, were repelled by human blockades with loud cheering and chanting as they tried to make arrests. Scotland Yard said the large crowds of people are “putting themselves and others at risk” just a day after Mayor of London Sadiq Khan warned it is “increasingly likely” restrictions will be needed to slow the spread of coronavirus in the capital, adding he was “extremely concerned” about the rate of transmission in London.