UK political party based on socialist principles, originally formed to represent workers. It was founded in 1900 and first held office in 1924. The first majority Labour government 1945–51 introduced nationalization and the National Health Service, and expanded social security. Labour was again in power 1964–70 and 1974–79. The party leader (Tony Blair from 1994) is elected by an electoral college, with a weighted representation of the Parliamentary Labour Party (30%), constituency parties (30%), and labor unions (40%).

A political party formed in Great Britain in 1900; characterized by the promotion of labor's interests and the socialization of key industries; Also called: Labour, Labor Party, Labor.