Labour has plunged to a record low in public support in the United Kingdom (UK), with a new YouGov poll showing the governing party backed by just 17% of voters; its worst rating ever in a YouGov poll.

The survey, conducted for The Times, shows the Greens rising to an unprecedented 16%, their highest ever national figure and just one point behind Labour. The party’s surge follows the election of Zack Polanski as leader last month, which has doubled Green support from the 6.7% it received in the 2024 general election.

Reform UK continues to lead the field on 27%, while the Conservatives remain mired at 17%, matching their own record low.

The Liberal Democrats are on 15%, higher than the 12% they won in 2024.

The data reveal that nearly half of Labour’s 2024 voters have deserted the party, with 18% now supporting the Greens, 13% turning to the Liberal Democrats, and 11% switching to Reform.

Among young voters aged 18–24, the Greens are now the largest party with 40% support, while Nigel Farage’s Reform dominates among over-65s at 33%.

The collapse comes after Labour’s recent humiliation in a by-election for the Senedd, the Welsh legislature. It finished third behind Plaid Cymru and Reform with just 11% of the vote.

Prime Minister Sir Keir Starmer faces mounting pressure to steady his party’s base as it bleeds support to both left and right.

While Reform UK does not have majority support nationally, Britain’s first-past-the-post system means the party could still win a significant number of seats (possibly even a majority); enough to reshape Parliament and trigger the biggest political shakeup in British politics in over a century.