A general election was held in the United Kingdom on Thursday 3 May 1979 to elect 635 members to the House of Commons (MPs). The election was held following the defeat of the Labour government in a no-confidence motion on 28 March 1979, six months before the Parliament was due for dissolution in October 1979. The Conservative Party, led by Margaret Thatcher, ousted the incumbent Labour government of Prime Minister James Callaghan, gaining a parliamentary majority of 43 seats. Thatcher thus became the United Kingdom's and Europe's first elected female head of government. 1979 was the first of four consecutive election victories for the Conservative Party, beginning 18 years in government for the Conservatives and 18 years in opposition for Labour. Unusually, the date chosen coincided with the 1979 local elections, where Labour recovered some lost councils. The parish council elections were pushed back a few weeks.
The previous parliamentary term had begun in October 1974, when Harold Wilson led Labour to a majority of three seats. However, after just two years, he had resigned as prime minister, being succeeded by James Callaghan; and within a further year the government's narrow majority had gone. To remain in power, Callaghan made agreements with the Liberals and later the Ulster Unionists, as well as the Scottish and Welsh nationalists. The Lib–Lab pact fell apart in July 1978, but Callaghan refused to call an autumn election as private polling Labour would not be likley to win a majority in the event. On 28 March 1979, following the defeat of the Scottish devolution referendum, Thatcher tabled a motion of no confidence, which was passed by one vote (311 to 310). This was the first successful vote of no-confidence since 1924, and triggered a premature general election.
Labour's campaign was hampered by recent memories of a series of industrial disputes and strikes during the winter of 1978–79, known as the Winter of Discontent, and the party focused on support for the National Health Service. The Conservatives pledged to control double-digit inflation and curb the power of trade unions. Both parties ran on lowering unemployment that had reached a 40-year high in 1978, with a memorable Conservative advertisement produced by Saatchi & Saatchi declaring "Labour Isn't Working". The Liberal Party was damaged by allegations that Jeremy Thorpe, its former leader, had been involved in a homosexual affair and had conspired to murder his former lover. The Liberals were now being led by David Steel, meaning that all three major parties entered the election with a new leader.
The election saw a 5.2% swing from Labour to the Conservatives, the largest percentage swing since the 1945 election, when Labour's Clement Attlee defeated Winston Churchill. Margaret Thatcher became prime minister, while Callaghan resigned as party leader and was replaced by Michael Foot in 1980. BBC election night coverage was presented by David Dimbleby and Robin Day, with Robert McKenzie on the "Swingometer", and featured further analysis by David Butler. It was the election night to feature Rick Wakeman's song "Arthur" during the BBC's coverage. On ITV, the election broadcast was hosted by Alastair Burnet, Martyn Lewis, Peter Snow and Leonard Parkin. Because of the economic and social backdrop in this election, commentators have drawn parallels to the 1980 United States presidential election in which incumbent US president Jimmy Carter was defeated by Ronald Reagan, an advocate of similar socioeconomic policies to those of Thatcher.
John Major, who would succeed Thatcher as prime minister in November 1990, first entered Parliament at this election, representing Huntingdonshire in Cambridgeshire. Former Cabinet ministers Shirley Williams and Barbara Castle, as well as Thorpe, were among the MPs who retired or lost their seats.
As of 2026, this is the earliest British election from which a major party leader (Steel) is still alive.
After suffering a vote of no confidence on 28 March 1979, Prime Minister James Callaghan was forced to announce that he would request a dissolution of Parliament to bring about a general election. The key dates were as follows:
Callaghan succeeded Harold Wilson as the Labour prime minister after the latter's surprise resignation in April 1976. By March 1977, Labour had become a minority government after two by-election defeats cost them the three-seat majority they had won in October 1974, and from March 1977 to August 1978 Callaghan governed by an agreement with the Liberal Party through the Lib–Lab pact. Callaghan had considered calling an election in the autumn of 1978, but ultimately decided that imminent tax cuts, and a possible economic upturn in 1979, could favour his party at the polls and delayed the election until the following year. Although published opinion polls suggested that he might win, private polls commissioned by the Labour Party from MORI had suggested the two main parties had much the same level of support.
However, events would soon overtake the Labour government and prove Callaghan's decision to delay an election to be a costly mistake. A series of industrial disputes in the winter of 1978–79, dubbed the "Winter of Discontent", led to widespread strikes across the country and seriously hurt Labour's standings in the polls while boosting support for the Conservative opposition. When the Scottish National Party (SNP) withdrew support for the Scotland Act 1978, a vote of no confidence was held and passed by one vote on 28 March 1979, forcing Callaghan to call a general election. As the previous election had been held in October 1974, Labour could have held on until the autumn of 1979 if it had not been for the lost confidence vote.
Margaret Thatcher had won her party's 1975 leadership election over former leader Edward Heath, taking over the leadership of the party in February 1975, four months after the party's failure to win the October 1974 election. Heath had led the party for a decade but lost three of the four elections he contested.
David Steel had replaced Jeremy Thorpe as leader of the Liberal Party in 1976, after allegations of homosexuality and conspiracy to murder his former lover forced Thorpe to resign. The Thorpe affair led to a fall in the Liberal vote, after what had been thought to be a breakthrough in the February 1974 election.
This was the first election since 1959 to feature three new leaders for the main political parties. The three main parties all advocated cutting income tax. Labour and the Conservatives did not specify the exact thresholds of income tax they would implement but the Liberals did, claiming they would have income tax starting at 20% with a top rate of 50%.
Without explicitly mentioning Thatcher's sex, Callaghan was (as Christian Caryl later wrote) "a master at sardonically implying that whatever the leader of the opposition said was made even sillier by the fact that it was said by a woman". Thatcher used the tactics that had defeated her other male opponents: constantly studying, sleeping only a few hours a night, and exploiting her femininity to appear as someone who understood housewives' household budgets.
A proposal for the two main party leaders to participate in two televised debates was put forward by former Labour MP turned broadcaster Brian Walden. These would have been produced by LWT and were planned to be shown on ITV on 22 & 29 April 1979. While James Callaghan immediately accepted Walden's proposal, Margaret Thatcher decided to "wait a few days before replying" to the invitation. According to The Glasgow Herald, Some of Mrs Thatcher's advisers were concerned that she had more to lose from such debates, fearing that it would lead to a "presidential-style 'Her or me' campaign" which would see policy issues become of less importance. However it was also reported that the danger of declining was that Mrs Thatcher would be charged by Labour as being "scared" to face the Prime Minister. At the insistence of the Liberals, their leader David Steel was also invited by LWT to take part, and accepted the offer. However, Mrs Thatcher declined the offer to take part, saying that the election was for a government, not a president, which meant that the debates did not go ahead.