The Polanski effect? These charts reveal how much the Greens have advanced

"The Greens talk of a Polanski effect a surge of momentum and visibility since Zack Polanski became leader, as the party gains attention in an increasingly fragmented political landscape. The polls offer the clearest signal so far of whether that narrative is borne out in public support. But they are not the only thing to consider and experts say the reality is hard to be certain about."

"Since Polanski was elected in September 2025, the Greens have risen by an average of four points in the polls. The Guardian's latest poll tracker which combines polls over the last 10 days has the party polling at 13.5%. This is five points behind Labour, on 18.6%. Line chart of Westminster poll averages The chart above shows that the average position of the Greens has increased since Polanski took over the leadership,"

Zack Polanski became leader in September 2025 and Greens support has risen by an average of four points since. A 10-day poll tracker shows the Greens at 13.5% compared with Labour at 18.6%. Individual polls vary, with YouGov and Find Out Now showing 17% while Focaldata, More in Common and Survation show around 10–11%. Differences may stem from whether pollsters prompt the Greens as an option and from differing modelling assumptions. YouGov estimates 20% of 2024 Labour voters would now vote Green, up from 11% when Polanski took over. Polls disagree on magnitude but indicate impact on Labour support.

Read at www.theguardian.com