The Aporia · UK Green leader confirmed as candidate for parliament seat vacated by Starmer

Zack Polanski, the UK Green Party's leader, has been confirmed as a candidate in the upcoming Holborn and St Pancras by-election, which will take place on October 8. The seat was vacated by Keir Starmer, who held it comfortably two years ago but with a reduced vote share. The Greens received over 10% of the vote in 2024, while an independent candidate took nearly 19%. Polanski has expressed optimism about the party's chances, saying they have "the momentum and we can win."

Written by the local model on 2026-09-11, using this article's own text rather than the other coverage of the same event (that is the story summary below).

Story summary

Zack Polanski, the leader of Britain's left-wing Green Party, has been confirmed as the party's candidate for a parliament seat in London's Holborn and St Pancras constituency, which was vacated by former Labour Prime Minister Keir Starmer after he moved to another seat. The by-election is scheduled for October 8. In the last general election, an independent candidate took nearly 19% of the vote in this constituency, while the Green Party candidate received over 10%. Polanski is optimistic about his party's chances, stating that despite being the underdog, they have momentum and can win. The Labour Party has also selected a candidate for the by-election, Sagal Abdi-Wali, who is currently the leader of the local council.

Written for “UK Parliament Election” on 2026-09-12, grounded in this article and the 0 other(s) covering the same event.

Why this leaning score

The model judged this article politically coded and scored it +0.35, but every quote it verified points left, so the score is not published.

Written under an earlier scoring contract, which gave a paragraph rather than checkable quotes. Re-analysing this article replaces it.

Leaning score withheld for article 7780: score contradicts its own evidence · logged 2026-09-11

📰 UK Parliament Election

Politics · 1 article(s) covering the same event. This is the one the site leads with.

Article leaning vs. publisher reliability

Source leaning vs. consistency

This article reads unscored and hedges 14% of its claims. Each row says how that neighbour differs.

Who are the candidates for Labour to replace Keir Starmer in the Holborn and St Pancras by-election? different event · 90%

Evening Standard

⚖️ leaning not scored 🔴 21% hedged 4 of 19 📰 publisher trust 59

“Article A mentions Sagal Abdi-Wali as a potential Labour candidate, while Article B mentions Zack Polanski as the confirmed Green Party candidate for the by-election”

Green Party deputy whose policy is to 'abolish landlords' is a landlord different event · 80%

Daily Mail

⚖️ Leans left 🔴 9% hedged 4 of 44 📰 publisher trust 58

“Article A describes a Green Party deputy's conflict of interest with their 'abolish landlords' policy, while Article B announces Zack Polanski as the party's candidate for a parliamentary seat”

Andy Burnham makes surprise London by-election visit as Labour faces Zack Polanski in fierce vote showdown different event · 80%

Evening Standard

⚖️ Leans left 🔴 6% hedged 1 of 18 📰 publisher trust 59

“Article A discusses the confirmation of Zack Polanski as a candidate for parliament seat, while Article B mentions Andy Burnham's visit to the constituency and a conversation with Abdi-Wali, indicating different events”

The Straits Times · 261 article(s) · 0 correction(s) detected

No corrections detected for this publisher. That may mean careful reporting, or simply that nothing has been checked.

The Straits Times

189 article(s) here · 1 carrying a prediction

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Britain Green Green Party LONDON Labour

Green Party ORG · 3× Green ORG · 2× Polanski PERSON · 2× Starmer PERSON · 2× Britain GPE · 1× Holborn GPE · 1× Keir Starmer PERSON · 1× LONDON GPE · 1× Labour NORP · 1× Zack Polanski PERSON · 1×

In the election two years ago, an independent candidate who campaigned primarily on opposition to Israel's war in Gaza took nearly 19% of the vote in that constituency, though that candidate has ruled himself out this time round.

framing: assertive · carried by 1 article(s) · first seen 2026-09-11

🔮 Polanski will be the Green candidate for Holborn and St Pancras, a left-leaning constituency which Starmer held comfortably in 2024 though with a much-reduced vote share, in a by-election due to take place on October 8.

2026-09-11 · The Straits Times

UK Green leader confirmed as candidate for parliament seat vacated by Starmer · assertive framing

UK Green leader confirmed as candidate for parliament seat vacated by Starmer LONDON, Sept 11 - asserted

leader → confirm → Starmer

The leader of Britain's left-wing Green Party Zack Polanski was on Friday confirmed as the party's candidate for a seat in parliament vacated by former Labour prime minister Keir Starmer. asserted

leader → confirm → Starmer

Polanski will be the Green candidate for Holborn and St Pancras, a left-leaning constituency which Starmer held comfortably in 2024 though with a much-reduced vote share, in a by-election due to take place on October 8. asserted

Starmer → lean → October

In the election two years ago, an independent candidate who campaigned primarily on opposition to Israel's war in Gaza took nearly 19% of the vote in that constituency, though that candidate has ruled himself out this time round. asserted

candidate → campaign → himself

The Green Party candidate received over 10% in 2024. asserted

candidate → receive → 2024

Polanski told Green Party supporters on Friday: "Greens might be the underdog in this election, but we have the momentum and we can win." uncertain

we → tell → momentum

Earlier this week the Labour Party selected the leader of the local council, Sagal Abdi-Wali, as their candidate for the by-election. asserted

Party → select → election

UK Green leader confirmed as candidate for parliament seat vacated by Starmer

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