The Labour Party's leadership vacuum has cast a spotlight on the potential implications for its electoral rivals, with Andy Burnham emerging as a frontrunner to succeed Keir Starmer. The impact is already being felt within the Green Party, which has experienced significant gains under Zack Polanski's ten-month tenure – including a tripling of membership and a doubling of poll ratings from around 10% to nearly double that figure. However, YouGov polling suggests a Labour resurgence could potentially reverse these trends, raising questions about whether Burnham's leadership would erode the Green Party's cross-party appeal.
Polanski's initial success has been attributed in part to occupying a clear political space to the left of Starmer, an area that might be contested by a Burnham premiership. A senior Green Party figure acknowledged this concern, suggesting that Polanski's strong message and effective communication have allowed him to tap into voter disillusionment with Labour under Starmer. The data supports this claim: YouGov found that 85% of 2024 Labour voters hold a favourable impression of the Green Party.
However, not everyone within the Green Party is convinced that Burnham's leadership would spell disaster for their party. Some officials anticipate a temporary bounce in Labour's poll numbers following Starmer's departure but are sceptical about how sustainable it would be, especially if Burnham struggles to enact meaningful change. Moreover, they argue that Burnham's policy agenda may not align with core issues driving voters from Labour to the Greens, such as stronger stances on international conflicts and public utility nationalisation.
Despite these internal debates, many within the Green Party remain optimistic about their party's enduring appeal. They point to a significant increase in people who have voted Green, suggesting historical trends indicate they will do so again. The recent by-election victory in Gorton and Denton and local election successes are seen as having dispelled the notion of a 'wasted vote', with many believing the party's momentum will continue.