Introduction

Zack Polanski has insisted he will remain at the helm of the Green Party despite losing a key by-election in London. The result in Holborn and St Pancras marked a significant test for the party, which had hoped to capitalize on growing voter momentum.

What Happened

Polanski secured 33 per cent of the vote, finishing second to Labour candidate Sagal Abdi-Wali, who won 45 per cent in the Holborn and St Pancras by-election. The Green vote share rose by 22 percentage points compared with the 2024 general election, indicating sustained voter interest despite the defeat.

The contest was overshadowed by a party-wide controversy over a Zionism motion passed by rank-and-file members, which declared Zionism a form of racism and backed a single democratic Palestinian state across historic Palestine. Polanski faced pressure from within his own ranks after he did not participate in the vote, citing campaign commitments in the constituency.

Critics, including Jewish Greens leader Vivien Lichtenstein and former party figures, argued that Polanski's absence and the motion's passage created a leadership crisis. Former Green leader Caroline Lucas described the motion as dangerous and flawed from top to bottom, while current Green MP Ellie Chowns reaffirmed Israel's right to exist and condemned the current Israeli government's actions.

Why This Matters

The by-election loss and the internal Zionism debate highlight a widening rift within the Green Party over Middle East policy and its impact on party unity. With four of five Green MPs and one deputy leader opposing the motion, the dispute has exposed deep divisions regarding the party's stance on Israel and Palestine.

Polanski's position - that anti-Zionism and antisemitism are distinct and that no member should be excluded based on faith - has been tested by mounting pressure. The controversy also carries political weight, as opponents point to the result as a setback for the party's electoral ambitions, while supporters note the improved vote share as evidence of growing support.

Key Takeaways

  • Zack Polanski vowed to stay on as Green Party leader despite a by-election defeat in Holborn and St Pancras.
  • The Green vote share increased by 22 points since the 2024 general election, even as the party lost the seat to Labour.
  • A controversial Zionism motion, passed by members, declared Zionism racist and sparked intense internal criticism.
  • Senior party figures, including Vivien Lichtenstein and Caroline Lucas, have called for accountability, though positions vary on whether Polanski should resign.
  • The Green Party's next leadership ballot is scheduled for summer 2027, with speculation about potential challenges to Polanski's position.

Conclusion

Zack Polanski's decision to remain in leadership despite pressure reflects the broader tension within the Green Party as it navigates contentious social and political issues. How the party manages the fallout from the Zionism motion and whether Polanski can maintain cohesion among its diverse membership will likely shape its trajectory leading up to the next leadership contest and beyond.