Zack Polanski faces sustained internal pressure as Green Party of England and Wales leader following the October 2026 party conference motion declaring Zionism a form of racism and his subsequent defeat in the Holborn and St Pancras by-election. Critics including the chair of Jewish Greens and former co-leader Caroline Lucas faulted his absence from the debate and vote, while the outcome contributed to lost local alliances and polling declines. Polanski has rejected calls to resign, citing member support and the party’s membership growth under his tenure. Governance reforms are slated for the spring conference, but the next leadership election remains scheduled for summer 2027, requiring either a substantial member petition or council vote to trigger an earlier contest. Trader assessments reflect these procedural thresholds and the durability of factional divisions.