Opinion polling for the 2019 United Kingdom general election was carried out by various organisations to gauge voting intentions. Most of the polling companies listed are members of the British Polling Council (BPC) and abide by its disclosure rules. The opinion polls listed range from the previous election on 8 June 2017 to the election on 12 December 2019.
Under the Fixed-term Parliaments Act 2011, the next general election after 2017 was not scheduled to be held until 5 May 2022. However, in late 2019, amid deadlock over the Brexit withdrawal agreement, Prime Minister Boris Johnson sought a snap election. After multiple failed attempts, Johnson introduced the Early Parliamentary General Election Act 2019, which was overwhelmingly approved by the House of Commons on 29 October 2019, triggering an early election.
Poll results are listed in the tables below in reverse chronological order. The highest percentage figure in each poll is displayed in bold, and its background is shaded in the leading party's colour. The "lead" column shows the percentage point difference between the two parties with the highest figures. When a poll result is a tie, the figures with the highest percentages are shaded and displayed in bold.
"Green" in these tables refers to combined totals for the green parties in the United Kingdom, namely the Green Party of England and Wales, the Scottish Greens, and, for polls of the entire UK, the Green Party Northern Ireland. The three parties share a commitment to environmental policies, but are independent of one another, with each contesting elections only in its own region.
The various polls use a variety of methodologies. For example, in Kantar and Ipsos MORI polls, Change UK and the Brexit Party were spontaneous responses and not prompted by the pollster. In YouGov polls before June 2019, only the Conservatives, Labour, and Liberal Democrats were prompted, the names of other parties being listed when "other" was selected. YouGov polls conducted since June 2019 prompt for both the Greens and the Brexit Party, alongside the earlier list. BMG polls also use two-stage questions in which the Conservatives, Labour, Liberal Democrats, the Brexit Party, the Greens, SNP, and Plaid Cymru are included on the initial prompt and the remaining parties provided after "another party" is selected. Prior to August 2019, BMG did not prompt the Brexit Party and the Greens initially.
As the parties standing for each seat became knownâÂÂand after the 11 November 2019 announcement that the Brexit Party would not be contesting the 317 seats won by the Conservatives in 2017âÂÂthe major pollsters began listing only those standing in a respondent's constituency as options.
Most national opinion polls do not cover Northern Ireland, which has different major political parties from the rest of the United Kingdom. This distinction is made in the tables below in the area column, where "GB" means Great Britain (England, Scotland and Wales), and "UK" means the entire United Kingdom. Plaid Cymru only stand candidates in Wales and the Scottish National Party (SNP) only stand candidates in Scotland.
Most polls are reported in terms of the overall popular vote share, and the pollsters do not typically project how these shares would equate to numbers of seats in the House of Commons. Others organisations including Electoral Calculus make rolling projections based on an aggregate of publicly available polls.
A small number of large polls were carried out in order to run multilevel regression with poststratification (MRP) models, which output predictions for each constituency.
On 20 February 2019, Liberal Democrats leader Vince Cable suggested that the Liberal Democrats might not put up candidates against The Independent Group (TIG)âÂÂwho were subsequently renamed Change UKâÂÂin future elections. In March 2019, Business Insider reported that the Lib Dems and TIG discussed forming an electoral alliance.
An exit poll conducted by Ipsos for the BBC, ITV, and Sky News was published at the end of voting at 22:00, predicting the number of seats for each party.
Number Cruncher Politics polled adults living in the 60 English marginal constituencies with a Labour or Conservative majority of less than 5 per cent at the 2017 election.
Note that where the client is a political party, constituency level polling may be particularly susceptible to publication bias.