The Labour Party is a centre-left political party in the United Kingdom. It grew out of the trade union movement and socialist political parties of the nineteenth century and has been described as a broad church; the party contains a diversity of ideological trends from strongly socialist, to more moderately social democratic.
Founded in 1900, the Labour Party overtook the Liberal Party in general elections during the early 1920s and formed minority governments under Ramsay MacDonald in 1924 and 1929–31. The party was in a wartime coalition from 1940 to 1945, after which it formed a majority government under Clement Attlee. Labour was also in government from 1964 to 1970 under Harold Wilson and from 1974 to 1979, first under Wilson and then James Callaghan. More: en.wikipedia.org.