The Poll Tax Riot on 31st March 1990, in Westminster, London, England. Angry crowds, protested against Margaret Thatcher's local authority tax. What started as a family day out with placards escalated into the worst riots seen in the city for a century. Protesters confronted police officers then stormed the Whitehall area then London's West End, starting fires and overturning cars, looting businesses up Charing Cross Road and St Martin's Lane. Forty-five police officers were among the 113 people injured as well as 20 police horses. 340 people were arrested.