Full Breakdown
Zack Polanski’s Bid for Keir Starmer’s Former Seat: What’s at Stake
9/7/2026, 11:30:08 AM
Core Event
Green Party leader Zack Polanski has confirmed his intention to stand in the Holborn and St Pancras by-election triggered by former Prime Minister Sir Keir Starmer’s resignation as MP.
Background & Context
Starmer’s departure—announced shortly after stepping down as prime minister—creates the sixth by-election of 2026. The seat has been a Labour stronghold since its creation in 1983, with Sir Keir Starmer winning it in 2024 by a majority of 11,572 votes. Earlier by-elections, notably the Gorton and Denton win for the Greens in February 2026 and the Makerfield contest that returned Labour leader Andy Burnham to Westminster, have reshaped the political calculus in inner-city constituencies.
Data & Statistics
- 2024 general-election results in Holborn and St Pancras: Labour 48.9 % (majority 11,572), independent Andrew Feinstein 18.9 % (7,312 votes), Greens 10.4 % (4,030 votes).
- Greens’ national poll standing fell from 21 % in February to 13 % in August (YouGov).
- After Starmer’s resignation, 14 % of former Labour voters said they would back the Greens; that figure dropped to 9 % after Burnham became prime minister (YouGov).
- Green Party membership stands at 230,000 following a rapid rise after the Gorton and Denton victory.
Official Statements & Responses
- Prof. John Curtice, a polling expert, described the by-election as a “severe test” for Polanski, noting that his personal popularity has been dented by a controversial tweet about the Golders Green stabbing suspect.
Criticism & Opposition
- Party insiders have labelled Polanski “terminally online,” questioning the strategic value of his heavy social-media presence.
- Usman Ayyub, a 27-year-old section manager, criticized Labour’s inconsistency, saying the party “has completely lost the plot.”
Conflicting Reports & Gaps
- Polling snapshots differ: *YouGov* shows Greens at 13 % nationally, while *Politico*’s poll-of-polls metric places Labour tied with Reform UK, suggesting a more competitive environment than the YouGov trend alone indicates.
- No official date for the by-election has been set, leaving campaign timelines uncertain.
Verbatim Quotes
- “They don’t know what they’re doing,” — Usman Ayyub
- “We’ll make sure that we keep pushing him left rather than listening to Nigel Farage. That argument has been resonating with people.” — Pointing, at Scala, a famed nightclub in the constituency, Polanski
Timeline
- Earlier this week – Starmer announces resignation as MP to focus on “international affairs.”
- Thursday – Polanski publicly declares his intention to stand, pending selection by local Green members.
- Upcoming – Local Green members expected to vote on the candidate within the next week; by-election date to be announced.
What’s Next
The Green Party must secure Polanski’s selection and consolidate the progressive vote while Labour prepares a candidate—rumoured to be Camden council leader Sagal Abdi-Wali. The by-election will test whether the Greens can translate recent local-election gains into a parliamentary breakthrough or whether Labour’s “Burnham bounce” will preserve its historic hold on the seat.
