| Name | Acronym | Reason not affiliated | Year left |
| Alliance and Leicester Group Union of Staff | ALGSU | Merged into CWU | 2007[7] |
| Amalgamated Association of Beamers, Twisters and Drawers (Hand and Machine) | AABTD | Disaffiliated | 1992[8] |
| Amalgamated Engineering Union | AEU | Merged into AEEU | 1992[9] |
| Amalgamated Engineering and Electrical Union | AEEU | Merged into Amicus | 2002[7] |
| Amalgamated Felt Hat Trimmers, Wool Formers and Allied Workers | AFHTW&AWF | Merged into NUTGW | 1982[9] |
| Amalgamated Slaters, Tilers and Roofing Operatives Society | | Merged into AUBTW | 1969 |
| Amalgamated Society of Boilermakers, Shipwrights, Blacksmiths and Structural Workers | ASBSBSW | Merged into GMB | 1982[9] |
| Amalgamated Society of Journeymen, Felt Hatters and Allied Workers | ASJFH | Merged into NUTGW | 1982[9] |
| Amalgamated Society of Leatherworkers | | Merged into NUFLAT | 1971 |
| Amalgamated Society of Lithographic Printers | ASLP | Merged into NGA | 1969 |
| Amalgamated Society of Operative Lace Makers and Auxiliary Workers | ASOLMAW | Merged into NUHKW | 1973 |
| Amalgamated Society of Painters and Decorators | ASPD | Merged into ASWD | 1970 |
| Amalgamated Society of Woodcutting Machinists | ASWM | Merged into FTAT | 1971 |
| Amalgamated Society of Woodworkers | ASW | Merged into ASWD | 1970 |
| Amalgamated Society of Woodworkers and Decorators | ASWD | Merged into UCATT | 1971 |
| Amalgamated Textile Warehouse Operatives Association | | Dissolved | 1986 |
| Amalgamated Textile Workers Union | ATWU | Merged into GMB | 1986[9] |
| Amalgamated Union of Asphalt Workers | | Merged into TGWU | 1987[9] |
| Amalgamated Union of Building Trade Workers | AUBTW | Merged into UCATT | 1971 |
| Amalgamated Union of Engineering Workers - Technical Administrative and Supervisory Section | AUEW-TASS | Merged into MSF | 1988[9] |
| Amalgamated Union of Sailmakers | | Merged into UCATT | 1971 |
| Amalgamated Weavers' Association | AWA | Merged into ATWU | 1974 |
| Amicus | Amicus | Merged into Unite | 2007[7] |
| Aspect | Aspect | Merged into Prospect | 2012 |
| Associated Metalworkers Union | AMU | Merged into AEEU | 2001[7] |
| Association for College Management | ACM | Merged into ATL | 2011 |
| Association of Broadcasting and Allied Staffs | ABS | Merged into BETA | 1984 |
| Association of Building Technicians | ABT | Merged into ASW | 1970 |
| Association of Cinematograph Television and Allied Technicians | ACTT | Merged into BECTU | 1991 |
| Association of Magisterial Officers | AMO | Merged into PCS | 2005[7] |
| Association of Patternmakers and Allied Craftsmen | APAC | Merged into AUEW-TASS | 1984[9] |
| Association of Post Office Executives | | Merged into SPOE | 1972 |
| Association of Professional, Executive, Clerical and Computer Staff | APEX | Merged into GMB | 1989[9] |
| Association of Scientific, Technical and Managerial Staffs | ASTMS | Merged into MSF | 1988[9] |
| Association of University Teachers | AUT | Merged into UCU | 2006[7] |
| Banking, Insurance and Finance Union | BIFU | Merged into UNIFI | 1999[7] |
| Birmingham and Midland Sheet Metal Workers' Society | | Merged into NUSMWCHDE | 1973 |
| British Association of Colliery Management – Technical, Energy and Administrative Management | BACM-TEAM | Merged into Prospect | 2014[3] |
| British Roll Turners Trade Society | BRTTS | Merged into AUEW | 1983[9] |
| Broadcasting and Entertainment Trades Alliance | BETA | Merged into BECTU | 1991 |
| Card Setting Machine Tenters Society | CSMTS | Dissolved | 2008 |
| Chain Makers and Strikers Association | | | |
| Chemical Workers' Union | CWU | Merged into TGWU | 1971 |
| Cheshire Group Staff Union | CGSU | Merged into OURS | 2010 |
| Cigarette Machine Operators' Society | CMOS | Dissolved | 1988 |
| Civil and Public Services Association | CPSA | Merged into PCS | 1998[7] |
| Cloth Pressers' Society | | Dissolved | 1984[8] |
| Communication Managers' Association | | | |
| Community and District Nursing Association | CDNA | Merged into GMB | 2010 |
| Community and Youth Workers' Union | CYWU | Merged into TGWU | 2006[7] |
| Confederation of Health Service Employees | COHSE | Merged into Unison | 1993 |
| Constructional Engineering Union | CEU | Merged into AUEW | 1971 |
| Connect | Connect | Merged into Prospect | 2010 |
| Cooper and Allied Workers Federation of Great Britain | | Merged into NUGMW | 1979[9] |
| Court Officers' Association | | Merged into CPSA | 1974 |
| Customs and Excise Federation | | Merged into CEG | 1972 |
| Customs and Excise Group | | Merged into SCPS | 1975 |
| Customs and Excise Preventative Staff Association | | Merged into CEG | 1972 |
| Derbyshire Group Staff Union | DGSU | Merged into OURS | 2010 |
| Diageo Staff Association | | Dissolved | 2010 |
| Draughtsmen's and Allied Technicians' Association | DATA | Merged into AUEW | 1970 |
| Electrical, Electronic, Telecommunication and Plumbing Trade Union | EETPU | Merged into AEEU | 1992[9] |
| Electrical Trades Union | ETU | Merged into EETPU | 1968 |
| Engineering and Fastener Trade Union | EFTU | Dissolved | 2004 |
| Engineers and Managers Association | EMA | Merged into Prospect | 2001[7] |
| Engineer Surveyors' Association | ESA | Merged into ASTMS | 1975 |
| Film Artists' Association | FAA | Merged into BECTU | 1995 |
| Furniture, Timber and Allied Trades Union | FTAT | Merged into GMB | 1993[9] |
| General Union of Loom Overlookers | GULO | Dissolved | 2007 |
| Graphical, Paper and Media Union | GPMU | Merged into Amicus | 2005[7] |
| Greater London Staff Association | GLSA | Merged into GMB | 1988[9] |
| Grimsby Steam and Diesel Fishing Vessels Engineers' and Firemen's Union | | Merged into TGWU | 1976 |
| Health Visitors' Association | HVA | Merged into MSF | 1990[9] |
| Huddersfield and District Healders and Twisters Trade and Friendly Society | | Merged into NUDBTW | 1980[9] |
| Inland Revenue Staff Federation | IRSF | Merged into PTC | 1996 |
| Institution of Professionals, Managers and Specialists | IPMS | Merged into Prospect | 2001[7] |
| Iron and Steel Trades Confederation | ISTC | Merged into Community | 2004[7] |
| Iron, Steel and Wood Barge Builders and Helpers Association | | Merged into TGWU | 1973 |
| Laminated and Coil Spring Workers' Union | | | |
| Leeds and District Warp Dressers', Twisters' and Kindred Trades Association | | Merged into YSTC | 1975 |
| Leicester and Leicestershire Hosiery Trimmers' Association | | Merged into NUHKW | 1970 |
| London Jewish Bakers' Union | LJBU | Dissolved | 1969 |
| Managers' and Overlookers' Society | M&O | Merged into ASTMS | 1977 |
| Manufacturing, Science and Finance | MSF | Merged into Amicus | 2002[7] |
| Medical Practitioners' Union | MPU | Merged into ASTMS | 1970 |
| Merchant Navy and Airline Officers Association | MNAOA | Merged into NUMAST | 1985 |
| Midland Glass Bevellers' and Kindred Trades' Society | | Merged into NUFTO | 1970 |
| Military and Orchestral Musical Instrument Makers' Trade Society | | | |
| Ministry of Labour Staff Association | | Merged into CPSA | 1973 |
| National Association of Teachers in Further and Higher Education | NATFHE | Merged into UCU | 2006[7] |
| National Association of Theatrical Television and Kine Employees | NATTKE | Merged into BETA | 1984 |
| National and Local Government Officers Association | NALGO | Merged into Unison | 1993 |
| National Coal Board Labour Staff Association | | | |
| National Communications Union | NCU | Merged into CWU | 1995 |
| National Graphical Association | NGA | Merged into GPMU | 1992 |
| National League of the Blind and Disabled | NLBD | Merged into ISTC | 2000[7] |
| National Society of Brushmakers and General Workers | | Merged into FTAT | 1983[9] |
| National Society of Metal Mechanics | NSMM | Merged into AUEW-TASS | 1985[9] |
| National Union of Agricultural and Allied Workers | NUAAW | Merged into TGWU | 1982[9] |
| National Union of Basket, Cane, Wicker and Fibre Furniture Makers | | Dissolved | 1973 |
| National Union of Blastfurnacemen, Ore Miners, Coke Workers and Kindred Trades | NUB | Merged into ISTC | 1985 |
| National Union of Boot and Shoe Operatives | NUBSO | Merged into NUFLAT | 1971 |
| National Union of Civil and Public Servants | | Merged into PTC | 1996 |
| National Union of Commercial Travellers | | Dissolved | 1970 |
| National Union of Domestic Appliances and General Operatives | NUDAGO | Merged into Community | 2006[7] |
| National Union of Dyers, Bleachers and Textile Workers | NUDBTW | Merged into TGWU | 1982[9] |
| National Union of Funeral Service Operatives | NUFSO | Merged into FTAT | 1978[9] |
| National Union of Furniture Trade Operatives | NUFTO | Merged into FTAT | 1971 |
| National Union of Glovers and Leather Workers | NUGLW | Merged into NUFLAT | 1971 |
| National Union of Gold, Silver and Allied Trades | NUGSAT | Merged into AUEW-TASS | 1981[9] |
| National Union of Insurance Workers | | Merged into MSF | 1999[7] |
| National Union of Knitwear, Footwear and Apparel Trades | KFAT | Merged into Community | 2004[7] |
| National Union of Leather Workers and Allied Trades | NULWAT | Merged into NUFLAT | 1971 |
| National Union of Lock and Metal Workers | | Merged into TGWU | 2004[7] |
| National Union of Public Employees | NUPE | Merged into Unison | 1993 |
| National Union of Railwaymen | NUR | Merged into RMT | 1990[8] |
| National Union of Scalemakers | | Merged into MSF | 1993[9] |
| National Union of Seamen | NUS | Merged into RMT | 1990[8] |
| National Union of Sheet Metal Workers, Coppersmiths and Heating and Domestic Engineers | NUSMWCHDE | Merged into AUEW-TASS | 1983[9] |
| National Union of Tailors and Garment Workers | NUTGW | Merged into GMB | 1991[9] |
| National Union of Textile and Allied Workers | NUTAW | Merged into ATWU | 1974 |
| National Union of Vehicle Builders | NUVB | Merged into TGWU | 1972 |
| National Union of Wallcoverings, Decorative and Allied Trades | NUWDAT | Merged into NGA | 1979 |
| National Wool Sorters Society | | Merged into APEX | 1980[9] |
| NatWest Staff Association | | Merged into UNIFI | 1999[7] |
| Northern Carpet Trades Union | NCTU | Merged into TGWU | 2000[7] |
| Nottingham and District Hosiery Finishers' Association | | Merged into NUHKW | |
| One Union of Regional Staff | OURS | Merged into NGSU | 2011 |
| Pattern Weavers Society | | Disaffiliated | 1987[8] |
| Plumbing Trades Union | PTU | Merged into EETPU | 1968 |
| Post Office Engineering Union | POEU | Merged into NCU | 1985 |
| Power Loom Carpet Weavers and Textile Workers Union | | Merged into ISTC | 2000[7] |
| Print Block, Roller and Stamp Cutters' Society | | Merged into NUWDAT | 1969 |
| Process and General Workers' Union | | Merged into TGWU | 1969 |
| Public Services, Tax and Commerce Union | PTC | Merged into PCS | 1998[7] |
| Radio and Electronic Officers Union | REOU | Merged into NUMAST | 1985 |
| Retail Book, Stationery and Allied Trades Employees' Association | | Disaffiliated | |
| Rossendale Union of Boot, Shoe and Slipper Operatives | RUBSSO | Merged into KFAT | 1997 |
| Saddleworth and District Weavers and Woollen Textile Workers' Association | | Merged into NUDBTW | 1973 |
| Scottish Commercial Motormen's Union | SCMU | Merged into TGWU | 1971 |
| Scottish Prison Officers Association | SPOA | Merged into POA | 2000[7] |
| Scottish Typographical Association | | Merged into SOGAT | 1974 |
| Scottish Union of Bakers and Allied Trades | | Merged into USDAW | 1978 |
| Sheffield Amalgamated Union of File Trades | | Merged into TGWU | 1970 |
| Sheffield Sawmakers Protection Society | | Merged into TGWU | 1984[9] |
| Sheffield Wool Shear Workers Union | SWSWU | Dissolved | 2007 |
| Skipton Union Representing Group Employees | SURGE | Merged into Aegis | 2014[3] |
| Sign and Display Trade Union | | Merged into NATSOPA | 1972 |
| Society of Civil and Public Servants | | Merged into NUCPS | 1988 |
| Society of Goldsmiths, Jewellers and Kindred Trades | | Merged into NUGSAT | 1969 |
| Society of Graphical and Allied Trades | SOGAT | Merged into GPMU | 1992 |
| Society of Lithographic Artists, Designers and Engravers | SLADE | Merged into NGA | 1982 |
| Society of Shuttlemakers | | | |
| Society of Technical Civil Servants | | Merged into IPCS | 1969 |
| Society of Telecommunication Engineers | | Merged into APOE | 1969 |
| Spring Trapmakers Society | | Dissolved | 1988[8] |
| Staff Union Dunfermline Building Society | SUDBS | Merged into NGSU | 2011 |
| Tobacco Workers' Union | TWU | Merged into GMB | 1986[9] |
| Trade Society of Machine Calico Printers | | | |
| Transport and General Workers Union | TGWU | Merged into Unite | 2007[7] |
| UNiFI | UNiFI | Merged into UNIFI | 1999[7] |
| UNIFI | UNIFI | Merged into Amicus | 2004[7] |
| Union for Bradford and Bingley Staff and Associated Companies | UBAC | Merged into Advance | 2009 |
| Union for Woolwich Staff | UWS | Merged into UNIFI | 2002[7] |
| Union of Communication Workers | UCW | Merged into CWU | 1995 |
| Union of Insurance Staffs | | Merged into ASTMS | 1970 |
| Union of Jute, Flax and Kindred Textile Operatives | | Merged into NUDBTW | 1979[9] |
| Union of Salt, Chemical and Industrial General Workers | | Merged into NUGMW | 1969 |
| Union of Textile Workers | UTW | Merged into Amicus | 2002[7] |
| United French Polishers' Society | | Merged into NUFTO | 1969 |
| United Rubber Workers of Great Britain | | Merged into NUGMW | 1974 |
| United Society of Engravers | | Merged into SLADE | 1973 |
| Watermen, Lightermen, Tugmen and Bargemen's Union | | Merged into TGWU | 1971 |
| Waterproof Garment Workers' Trade Union | | Merged into NUTGW | 1972 |
| Wire Workers' Union | WWU | Merged into ISTC | 1991 |
| Yorkshire Association of Power Loom Overlookers | YAPLO | Merged into TGWU | 1993[9] |
| Yorkshire Independent Staff Association | YISA | Merged into Aegis | 2014[3] |
| Yorkshire Society of Textile Craftsmen | | Merged into NUDBTW | 1980[9] |