British Leyland was an automotive engineering and manufacturing conglomerate formed in the United Kingdom in 1968 as British Leyland Motor Corporation Ltd (BLMC), following the merger of Leyland Motors and British Motor Holdings. It was partly nationalised in 1975, when the UK government created a holding company called British Leyland, later BL, in 1978. It incorporated much of the British-owned motor vehicle industry, which constituted 40 percent of the UK car market, with roots going back to 1895.
Despite containing profitable marques such as Jaguar, Rover and Land Rover, as well as the best-selling Mini, British Leyland had a troubled history. In 1986 it was renamed as the Rover Group, later to become MG Rover Group, which went into administration in 2005, bringing mass car production by British-owned manufacturers to an end. MG and the Austin, Morris and Wolseley marques became part of China's SAIC, with whom MG Rover attempted to merge prior to administration.