Full Breakdown
Green Leader Zack Polanski Faces Labour in High-Stakes Holborn and St Pancras By-Election
By Drooid · · How we work
The Contest and Its Stakes
Voters in Sir Keir Starmer’s former constituency will choose a new MP on 8 October. The seat, held by Labour since 1983, is contested by Green leader Zack Polanski and Labour’s Sagal Abdi-Wali, leader of Camden Council. Fifteen candidates have entered the race, and recent polling by Ladbrokes and Stats for Left projects a Labour win, though some commentators describe the contest as “close”.
Background: Party Dynamics and the Zionism Debate
Polanski became Green leader in September 2025 as membership rose to over 200,000, tripling the base and delivering a surprise victory in the Gorton and Denton by-election in February 2026. An internal motion defining Zionism as a form of racism passed by 209 votes after 1,022 members (about 0.4 % of the total) voted in favour. Critics argue the debate has eclipsed broader environmental and economic issues.
Key Figures
- Zack Polanski – Green Party leader, London Assembly member.
- Sagal Abdi-Wali – Labour candidate, Camden Council leader.
- Dale Vince – Founder of Ecotricity, donor of £50,000 to Labour’s campaign.
- Adrian Ramsay – Green MP for Waveney Valley.
- Robert Ford – Professor of politics, Manchester University.
- Labour spokesperson – Campaign finance contact.
Data & Statistics
- Housing pressure: Camden’s 2026 report recorded 8,380 households on the social-housing waiting list, a 9.5 % rise year-on-year.
- Financial backing: Vince’s donation is more than 25 % of the £180,050 spending limit for candidates.
- Polling trends: Greens peaked at >20 % after the February win but have slipped to roughly 11 % in recent YouGov tracking.
- Membership growth: Party enrollment rose from roughly 70,000 to over 200,000 under Polanski.
Official Statements & Responses
Labour confirmed all contributions will be reported to the Electoral Commission. Abdi-Wali has signalled opposition to new North-Sea oil and gas projects, saying she would vote against the Rosebank and Jackdaw developments. Polanski’s campaign emphasizes a “vote Green” strategy to push the government leftward on climate and social policy.
Criticism & Opposition
Academics and party members warn the “Zionism is racism” motion could cap Green electoral growth. Four of the five Green MPs in Westminster have publicly opposed the motion, arguing it risks alienating voters and attracting legal challenges under equality law.
Verbatim Quotes
- “This act of self-indulgence by a radical fringe of activists will put a lower ceiling on Green support right at a time when a broader breakthrough became plausible,” — Robert Ford
- “All donations will be declared in the normal way, in line with Electoral Commission and Parliamentary rules.” — Labour spokesperson
- “Voting Green, between general elections, is the most powerful vote you can make,” — Zack Polanski
Conflicting Reports & Gaps
Polling projections differ: Ladbrokes and Stats for Left forecast a Labour victory, while unnamed analysts suggest a tighter race. The impact of the Zionism motion on voter behaviour remains unquantified, and no post-by-election analysis is yet available.
What’s Next
The by-election on 8 October will determine whether Labour retains its historic hold on Holborn and St Pancras and curb the Greens’ recent surge. The outcome will also shape internal Green debates on policy direction and party governance.