Trade unions
U
| Full Name | Short Name | Notes |
|---|---|---|
| Undeb Cenedlaethol Athrawon Cymru | UCAC | |
| Union of Construction, Allied Trades and Technicians | UCATT | |
| Union of Patternmakers | UPM | |
| Union of Post Office Workers | UPW | Founded in 1919 by the merger of the Postmen's Federation, Postal and Telegraph Clerks' Association and the Fawcett Association. Became the Union of Communication Workers in 1920 and in 1995 the Communication Workers' Union. |
| Union of Print Workers | UPW | |
| Union of Shop, Distributive and Allied Workers | USDAW | |
| Union of Textile Workers | UTW | |
| UNISON | UNISON | Formed in 1993 when three public sector trade unions, the National and Local Government Officers Association (NALGO), the National Union of Public Employees (NUPE) and the Confederation of Health Service Employees (COHSE) merged. |
| Unite | Unite | Formed on 1 May 2007 by the merger of Amicus and the Transport and General Workers' Union. |
| United French Polishers' Society | UFP | |
| United Patternmakers' Association | UPA | |
| United Textile Factory Workers' Association | UTFWA |