This is a list of trade unions in the United Kingdom formed under UK labour law. The criteria for being an independent trade union, free from employer influence and domination, are set out in Section 5 of the Trade Union and Labour Relations (Consolidation) Act 1992. The body which oversees unions, and awards a certificate of independence for the purpose of collective bargaining is the Trades Union Certification Officer. For the context and history see Trade unions in the United Kingdom.
Union confederations
Trades Union Congress (TUC) Scottish Trades Union Congress (STUC) General Federation of Trade Unions (GFTU) Irish Congress of Trade Unions (ICTU)
Trade unions The following is a list of trade unions as designated by the Certification Officer, as of 20 December 2025: