Recent internal divisions within the Green Party of England and Wales, triggered by members passing a "Zionism is racism" motion at the October 2026 conference and Zack Polanski's absence from the vote while campaigning, have fueled calls for his resignation from figures including the Jewish Greens chair. His second-place finish in the Holborn and St Pancras by-election on October 9, despite tripling the party's prior vote share, intensified scrutiny from former leaders. Polanski has rejected stepping down, emphasizing member authority, and proposed rule changes to strengthen leadership control. Party procedures make an early removal difficult, requiring a 10% member petition or two-thirds council vote before his scheduled re-election contest next summer, though the episode highlights risks around policy cohesion and electoral momentum ahead of that vote.