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The 2026 English local elections marked the strongest ever performance of the Green Party of England and Wales (GPEW). This article places that success in the context of a decade of political upheaval and research into the party. It argues that the GPEW has grown by layering successive issue publics—anti-austerity, Brexit and Gaza—onto an enduring environmental and protest core. Moreover, its post-2015 establishment within the British party system has enabled it to benefit repeatedly from fluctuations in Labour Party popularity among sections of the electorate, as well as opportunities created by changing geographies of party competition, leaving openings in areas with weak centre-left competition. Reinforced by the decline of social voting, the rise of issue voting and successful political strategy, the Greens have progressively accumulated new issue, social and geographic bases, transforming themselves from a niche protest party into an increasingly plural but ideologically coherent party.
