Zack Polanski, elected Green Party of England and Wales leader in September 2025 with roughly 85% member support, faces scrutiny tied to the October 8 Holborn and St Pancras by-election in Keir Starmer’s former seat. Party rules fix leadership terms at two years via one-member-one-vote elections, with no automatic removal mechanism. Recent conference passage of a contested “Zionism is racism” motion drew external referrals and internal divisions, though Polanski distanced himself from the vote while emphasizing party inclusivity. Pre-election polling showed Labour favored to retain the seat with the Greens in second, and senior figures including former leader Natalie Bennett have stated a loss would not trigger leadership change. Trader focus centers on whether the result or ongoing policy debates prompt an early challenge before the next scheduled contest.