Miners' Federation of Great Britain

The National Union of Mineworkers (NUM) is a trade union for coal workers in Great Britain, formed in 1945 out of the Miners' Federation of Great Britain (MFGB). The NUM took part in three national miners' strikes, in 1972, 1974 and 1984–85. Following 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 2023 to an active membership of 196.