The Trafalgar Square Defendants Campaign was an organisation set up to provide practical support for the hundreds of people who were arrested during and after the 1990 Poll Tax Riots

Poll Tax Riots

The UK Poll Tax Riots were a series of mass disturbances, or riots, in British towns and cities during protests against the Community Charge , introduced by the Conservative government led by Prime Minister Margaret Thatcher...

 and in particular, to push for the release of all prisoners and the dropping of all charges. Their case was strengthened when Channel 4

Channel 4

Channel 4 is a British public-service television broadcaster which began working on 2 November 1982. Although largely commercially self-funded, it is ultimately publicly owned; originally a subsidiary of the Independent Broadcasting Authority , the station is now owned and operated by the Channel...

broadcast footage showing the police attacking marchers prior to the riot breaking out.