1979 vote of no confidence in the Callaghan ministry

A vote of no confidence in the British Labour government of James Callaghan occurred on 28 March 1979. The vote was brought by Opposition leader Margaret Thatcher and was lost by the Labour Government by one vote (311 votes to 310), which was announced at 10:19 pm. The result forced a general election which was won by Thatcher's party. The last time an election had been forced by the House of Commons was in 1924, when Ramsay MacDonald, the first Labour Prime Minister, lost a vote of confidence. Labour politician Roy Hattersley later remarked that the vote marked "the last rites" of 'old Labour'. Labour did not return to government for another 18 years. The BBC has referred to the vote as "one of the most dramatic nights in Westminster history".

To date, this is the last occasion on which a British government has lost a vote of confidence.

The general election at the end of February 1974 resulted in a hung parliament where Labour had slightly more seats than any other party but no overall majority. The Conservatives tried to negotiate a coalition with the Liberal Party but failed and Edward Heath's government resigned. Labour came to power in March 1974, its leader Harold Wilson having accepted the Royal invitation to form a minority government. Wilson called a second election for October 1974, which gave Labour a wafer-thin majority of three MPs. The Labour Government implemented pay restraint to control global inflation, coupled with stagnation and unemployment at record post-war levels. Wilson resigned in 1976 in poorer health, on turning 60, and James Callaghan became Leader of the Labour Party and Prime Minister. By-elections and defections whittled away Labour's majority, which technically was non-existent by April 1976 in the House of Commons after a by-election defeat, the defection of two Labour MPs to form the Scottish Labour Party and the defection of backbencher John Stonehouse.

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