Zack Polanski, leader of the Green Party, during a news conference in London, UK, on Wednesday, Aug. 5, 2026. Bloomberg via Bloomberg via Getty ImagesZack Polanski has claimed he and the Green Party helped “topple” Keir Starmer as prime minister. He said: “I think one of my biggest achievements in my coming up through the Green party was toppling a very unpopular prime minister. Advertisement“I am in no doubt that if we had not won Gorton and Denton, Keir Starmer would not have had the leadership crisis he had.” He added: “And obviously I very much agree with that and that’s something I’ve been talking about all year, and something the Green Party has been talking about for decades.”