SDP–Liberal Alliance
The SDP–Liberal Alliance was a centrist and social liberal political and electoral alliance in the United Kingdom. Formed by the Social Democratic Party (SDP) and the Liberal Party, the SDP–Liberal Alliance was established in 1981, contesting the 1982 United Kingdom local elections, 1983 United Kingdom local elections, 1983 general election, 1984 United Kingdom local elections, 1984 European election, 1985 United Kingdom local elections, 1986 United Kingdom local elections, 1987 United Kingdom local elections and 1987 general election.