Zack Polanski addressing Green Party conference,

Massive member gains for the Green Party. What about election success?

Last Updated: October 13, 2025By

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The Green Party in England and Wales has broken the 100,000-member mark for the first time – a surge attributed almost entirely to its new leader, Zack Polanski.

Party officials are reporting a nearly-50 per cent increase in just over a month – to more than 100,000 members – putting them on track to overtake the Conservatives if momentum continues (Tories don’t publish their membership figures but the party is widely believed to have around 120,000).

The numbers are impressive – but history shows that membership growth does not automatically convert to votes; under Jeremy Corbyn, Labour once had more than 500,000 members but still lost two general elections.

For the Greens, whose recent polling sits between 11 and 12 per cent—admittedly alongside one outlier survey showing 15 per cent—the question is whether enthusiasm among members can translate into wider public support.

Polanski has clearly energised the party. His social media campaigns and frequent TV appearances have made the Greens more visible than ever, and his rhetoric about supplanting Labour resonates with a segment of the electorate disillusioned with the status quo; he said he wanted to bring populism to the political left and he seems to be following the Nigel Farage playbook to do it.

In his first month as leader, he has positioned the Greens as the “only real opposition left in British politics,” championing fair taxes, environmental protection, and social compassion.

But visibility comes with challenges.


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Mainstream media outlets, led by figures like Piers Morgan, have repeatedly focused on Polanski’s more controversial views—particularly his stances on gender identity—often framing him as a culture-war figure rather than a policy-driven leader.

And to be honest, Morgan was very good at it. For many people, the way he leaned into the question, “Can a woman have a penis?” and ignored less controversial policies could have seriously undermined Polanski’s credibility – potentially limiting the party’s appeal beyond its base.

Can the Greens convert the current enthusiasm for them into broader electoral support in the face of this targeted media scrutiny?

Polanski himself claims, “We’re not here to be disappointed with Labour but to replace them.”

But 100,000 people is a tiny fraction of the UK’s population. Does the wider electorate share this vision—or see only controversy? That question will determine whether this membership surge has real political consequences.

Well, we have local elections in May next year – seven months’ time, in which Polanski will either consolidate his gains or lose ground to Establishment mouthpieces like Morgan.

If the Greens are able to translate membership growth into votes, they could reshape the political landscape.

They may even bring hope back to a demoralised country that has suffered too long in a political language filled mostly by right-wingers who might as well be clones of each other.

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