
The Associated Society of Locomotive Engineers and Firemen (ASLEF) is a British trade union representing train drivers. It is part of the International Transport Workers' Federation and the European Transport Workers' Federation. At the end of 2018 ASLEF had 22,424 members. Its current General Secretary is Mick Whelan.

The Bakers, Food and Allied Workers' Union (BFAWU) is a trade union in the United Kingdom. Founded in 1847 in Manchester, it represents workers in the food industry.

The Communication Workers Union (CWU) is the main trade union in the United Kingdom for people working for telephone, cable, digital subscriber line (DSL) and postal delivery companies. It has 110,000 members in Royal Mail as well as more in many other communication companies.

The Fire Brigades Union (FBU) is a trade union in the United Kingdom for wholetime firefighters, retained firefighters and emergency control room staff.

The GMB is a general trade union in the United Kingdom which has more than 600,000 members. Its members work in nearly all industrial sectors, in retail, security, schools, distribution, the utilities, social care, the National Health Service (NHS), ambulance service and local government.

The Musicians' Union (MU) is an organisation which represents over 30,000 musicians working in all sectors of the British music business.

The National Union of Mineworkers (NUM) is a trade union for coal miners in Great Britain, formed in 1945 from the Miners' Federation of Great Britain (MFGB). The NUM took part in three national miners' strikes, in 1972, 1974 and 1984–85. After the 1984–85 strike, and the subsequent closure of most of Britain's coal mines, it became a much smaller union. It had around 170,000 members when Arthur Scargill became leader in 1981, a figure which had fallen in 2015 to an active membership of around 100.

The Transport Salaried Staffs' Association (TSSA) is a trade union for workers in the transport and travel industries in the United Kingdom and Ireland. Its head office is in London, and it has regional offices in Bristol, Derby, Dublin, Manchester, York and Glasgow.

The Union of Shop, Distributive and Allied Workers (Usdaw) is a trade union in the United Kingdom, consisting of around 400,000 members. Usdaw members work in a variety of occupations and industries including: shopworkers, factory and warehouse workers, drivers, call centres, clerical workers, milkround and dairy process, butchers and meat packers, catering, laundries, chemical processing, home shopping and pharmaceutical. The retail sector employs around 2.77 million people.

Unison, stylised as UNISON, is the largest trade union in the United Kingdom. UNISON's members work predominantly in public services, including local government, education, health and outsourced services.

Unite the Union, commonly known as Unite, is a British and Irish trade union which was formed on 1 May 2007 by the merger of Amicus and the Transport and General Workers' Union (TGWU). Unite is the second largest trade union in the UK, with over 1.4 million members across construction, manufacturing, transport, logistics, and other sectors. The general secretary of Unite is Sharon Graham, who was elected on 25 August 2021 with 46,696 votes on a turnout of 124,127, with her term beginning on 26 August 2021.