The Socialist Party is a Trotskyist political party in England and Wales. Founded in 1997, it had formerly been Militant, an entryist group in the Labour Party from 1964 to 1991, which became Militant Labour from 1991 until 1997.

The All Britain Anti Poll Tax Federation, commonly known as "the Fed", was an organisation in Great Britain to co-ordinate the activities of local Anti-Poll Tax Unions (APTUs) campaigning against the Poll tax brought in by Margaret Thatcher's Conservative government in 1989 (Scotland) and 1990.