Zack Polanski, the new leader of the Green Party, has quickly become one of Britain's most prominent Jewish politicians and a central figure on the radical left. His leadership has propelled the Greens to unprecedented popularity, especially among young, urban voters, and is pressuring Prime Minister Keir Starmer's Labour Party to shift leftward as it loses support. Polanski's platform focuses on wealth redistribution, social justice, and a strong anti-Israel stance, moving traditional Green priorities like climate change to the background. His rise has also overshadowed Jeremy Corbyn's attempts to launch a new far-left party, which has been plagued by infighting and organizational chaos.

Polanski's charismatic and media-savvy style, combined with a clear populist message, has driven a surge in Green Party membership and polling, making the party a formidable force on Labour's left flank. While Corbyn's new party struggles with internal divisions, the Greens have united behind Polanski, positioning themselves as the main socialist alternative to Labour. Observers note that Polanski's leadership marks a shift in British politics, with the Greens capitalizing on disillusionment with mainstream parties and the growing appeal of left-wing populism.