Riot police officers stand firm in Trafalgar Square at the height of the Poll Tax Riot on 31st March 1990, in Westminster, London, England. Angry crowds, demonstrating against Margaret Thatcher's local authority tax, stormed the Whitehall area and then London's West End, starting fires and overturning cars, looting stores up Charing Cross Road and St Martin's Lane. The anti-poll tax rally in central London erupted into the worst riots seen in the city for a century. Forty-five police officers were among the 113 people injured as well as 20 police horses. 340 people were arrested.
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