Poll findings
A poll conducted by ThinkLabour and published exclusively by The Guardian indicates Green parties are running just four percentage points behind Labour across Britain’s urban constituencies. The thinktank, which has extensive links to the government of Andy Burnham, concluded that if the same pattern of support were replicated nationwide at a general election, Green parties could feasibly win up to 40 seats.
Movement of urban voters
The survey reports a marked movement of urban voters towards Green parties compared with results at the 2024 general election. ThinkLabour frames the shift as substantial enough to alter the electoral landscape in densely populated areas where margins can be tight and multiple parties compete for similar progressive electorates.
Implications for Labour
The findings are likely to be read as a warning for Labour in several inner-city constituencies, where a small swing can translate into a significant change in seat outcomes under the first-past-the-post system. Labour strategists will be watching whether the trend hardens or proves ephemeral as campaigning continues.
By-election test
The poll also underlines the specific challenge Labour faces in holding seats such as Holborn and St Pancras, where Zack Polanski, the Green party leader in England and Wales, is mounting a challenge in a by-election next month. The result there is being watched as a potential indicator of whether the Greens’ increased urban vote share can be converted into parliamentary representation.
Caveats and context
ThinkLabour’s links to regional government figures are likely to draw scrutiny of the research amid a crowded political field. As with all single polls, the results provide a snapshot of current sentiment rather than a definitive prediction; political analysts say sustained trends over multiple surveys and turnout patterns will determine how the headline numbers translate into seats at a general election.