The Terrorism Act 2000 (Proscribed Organisations) (Amendment) (No. 3) Order 2021
Part 2 of the Terrorism Act 2000 (c. 11) makes provision for the proscription of organisations (including setting out offences in relation to proscribed organisations in sections 11 to 13). An organisation is proscribed if it is listed in Schedule 2 to the Act or, in most cases, it operates under the same name as an organisation so listed (section 3(1)).