The 2019 United Kingdom general election was held on Thursday 12 December 2019, with 47,074,800 registered voters entitled to vote to elect 650 Members of Parliament (MPs) to the House of Commons. The governing Conservative Party, led by Prime Minister Boris Johnson, won a landslide victory with a majority of 80 seats, a net gain of 48, on 43.6 per cent of the popular vote, the highest percentage for any party since the 1979 general election, though with a narrower popular vote margin than that achieved by the Labour Party over the Conservatives at the 1997 general election. This was the second national election to be held in 2019 in the United Kingdom, the first being the 2019 European Parliament election.
After it lost its parliamentary majority at the 2017 general election, the Conservative Party governed in minority with the support of the Democratic Unionist Party (DUP). The prime minister, Theresa May, resigned in July 2019 after repeatedly failing to pass her Brexit withdrawal agreement in parliament. Johnson succeeded her as the leader of the Conservative Party and as prime minister in July 2019. Johnson could not persuade Parliament to approve a revised withdrawal agreement by the end of October, and chose to call a snap election, which the House of Commons supported under the Early Parliamentary General Election Act 2019. Opinion polls showed a firm lead for the Conservatives against the opposition Labour Party throughout the campaign.