sentences:  The Labour Party at this time had split, and there was a new challenge in the SDP–Liberal Alliance, formed by an electoral pact between the Social Democratic Party and the Liberal Party.However, this grouping failed to make its intended breakthrough, despite briefly holding an opinion poll lead.In the June 1983 general election, the Conservatives won 42.4% of the vote, the Labour Party 27.6% and the Alliance 25.4% of the vote.