Party now polling 15 points above Greens, who had been ahead of Labour before Keir Starmer resigned as PM

Labour is starting to win back voters on the left who became disillusioned under Keir Starmer’s leadership, the party’s deputy leader has claimed after it saw off Zack Polanski and the Greens to win the Holborn and St Pancras byelection.

Labour’s Sagal Abdi-Wali took 45% of a relatively low turnout to keep Starmer’s old north London seat for the party, pushing Polanski, who had stood for the party he leads, into second place on 33%.

Everywhere the PM turns, he finds generous adversaries. They have made his early days in No 10 so much easier

I don’t know where Andy Burnham found his magic lamp, but I hope he’s taking good care of it. In the early hours of Friday morning, the genie that’s looked so kindly on him these past few months granted him yet another wish, with a byelection win in Holborn and St Pancras. It was just the latest gift for a prime minister for whom things keep going right – and who is especially blessed in his choice of opponents.

Let’s start with that win in London, where Labour’s Sagal Abdi-Wali defeated the Green party leader, Zack Polanski. It’s easy to miss how rare such a victory is. As the veteran psephologist Peter Kellner pointed out, this was a win that “defied history”. If the past half-century were any guide, Labour should have lost, thanks to a “truly dreadful record” defending its own seats when in government and facing a byelection challenge from the left or centre-left, the likes of the Greens or the Lib Dems. The average swing against Labour in such contests had been 24%. “On those figures,” wrote Kellner, “Polanski should have won at a canter.” But he lost.

Jonathan Freedland is a Guardian columnist

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A byelection win is a fillip for Andy Burnham and shows Zack Polanski must confront the failures damaging his party’s credibility and appeal

By holding Holborn and St Pancras, Andy Burnham’s Labour has shown it can attract liberal and left-leaning voters. The seat has substantial numbers of young adults, students, professionals and Muslims – offering fertile ground for the Greens’ ecopopulism. However, Labour prevailed. Having won leave-voting Makerfield in June, Mr Burnham can now claim an appeal that bridges Labour’s divided electorate. It’s worth noting that turnout in London was low and Labour’s vote share fell 3.7 points. But that compares with an average 19.3-point fall in four byelections under Mr Burnham’s predecessor. The new leader clearly has bought Labour breathing space and checked the Green advance.

The Greens more than tripled their vote share in the constituency to 33%. But they were beaten. Labour’s Sagal Abdi-Wali took 45% in Sir Keir Starmer’s former seat, leaving Zack Polanski’s ambition of entering parliament unfulfilled. For a party that began the year promising to turn voters’ hunger for change into a serious challenge to Labour, this was a sobering moment. The passing of a motion declaring “Zionism is racism” at its conference probably cost the party support – though the result in central London alone cannot definitively say that. There is a separate question of leadership. Mr Polanski now says he would have voted against the motion. Why, then, did he not make his opposition clear when it mattered last weekend?

Vivien Lichtenstein urges party leader to quit over ‘Zionism is racism’ policy – but could face no-confidence motion herself

The chair of the Jewish Greens has called for Zack Polanski to step down as pressure increases on the Green leader to acknowledge anger within the party over a new policy that equates Zionism with racism and calls for the state of Israel to be abolished.

The comments by Vivien Lichtenstein come after Caroline Lucas, the Greens’ former leader and first MP, criticised Polanski for a lack of leadership in missing the debate and vote at the weekend that resulted in the policy being passed.

There was a real chance of a Green byelection win in Holborn and St Pancras. He made bad decisions and cost his party dear

As ever, among all the noise triggered by Labour holding the seat of Holborn and St Pancras, the most plain-spoken and undeniable analysis was provided by that sage and national treasure John Curtice, of Strathclyde University. The result, he said, echoed national opinion polls and reflected two undeniable facts: that the Greens are in need of a period of contrition and reflection, and Labour ought to be slightly less than ecstatic.

Andy Burnham’s party, with a majority of 3,364, he said, showed they “are in a much better position than they were six months ago, but still not as popular as they were in 2025”. The Greens, meanwhile, remain “a more significant player than historically they have ever been”, but have lost much of the ground they gained during Zack Polanski’s first year as leader, when the serial failures of the local MP – one Keir Starmer – provided him and his party with such a glorious succession of political opportunities.

John Harris is a Guardian columnist

Victory by Sagal Abdi-Wali in north London seat will reassure Andy Burnham in high-stakes battle for left of British politics

• Holborn and St Pancras byelection – live updates

Labour has seen off the Greens to win the Holborn and St Pancras byelection in a result that will reassure Andy Burnham and dent Zack Polanski’s position as a decisive power player on the left of British politics.

The byelection, called after the former prime minister Keir Starmer resigned from the seat in September, was considered a two-horse race between the Labour candidate, Sagal Abdi-Wali, and the Green party leader, Polanski. Abdi-Wali received 12,292 votes, 45% of the vote, to Polanski’s 8,928, 33% of the vote.

Contest seen as test of Andy Burnham’s ability to unite Labour voters amid threat from Green party’s Zack Polanski

Polls have closed in the Holborn and St Pancras byelection, a contest seen as a test of whether Andy Burnham can unite Labour’s voters or whether Zack Polanski can peel off support from the party’s progressive flank.

Labour is seeking to retain Keir Starmer’s former north London seat, where he won a majority of more than 11,000 votes in the 2024 general election.

Zack Polanski has led energetic campaign for the Greens, while Labour will hope to hold on to Starmer’s old seat

Voting has opened in the Holborn and St Pancras byelection, a contest seen as a key gauge of Andy Burnham’s ability to energise voters and whether Zack Polanski’s Greens can still peel off support from Labour’s left.

Polanski, who leads the Greens in England and Wales, is standing for his party in the north London constituency, previously held by Keir Starmer before he stood down as an MP shortly after resigning as prime minister.

Exclusive: Party leader says outcome of ‘knife-edge’ vote in Keir Starmer’s former seat will not affect his position

Zack Polanski has said his authority as leader of the Green party of England and Wales does not depend on winning next week’s Holborn and St Pancras byelection, amid suggestions the party’s popularity may have peaked.

Polanski, who is trying to take Keir Starmer’s former seat from Labour, described the contest as “probably 50/50 right now” and “really on a knife edge”.

Exclusive: Martha Dalton worked closely with Burnham’s team on byelection that secured his return to parliament

A recent lobbyist for the controversial $450bn US tech company Palantir played a senior role in helping Andy Burnham become prime minister, it has emerged.

Martha Dalton, whose company Lodestone worked for Palantir in 2024 and 2025, campaigned for Burnham in the Makerfield byelection that secured his return to parliament. She worked closely with his team on strategic communications and rebuttals, and was among supporters who clapped him into Downing Street in July.

Exclusive: Leader understood to have wanted to concentrate on Holborn and St Pancras campaign in London but executive committee voted against plan

Zack Polanski requested that the Greens’ ruling executive committee postpone the party’s imminent annual conference so they could focus on the Holborn and St Pancras byelection but was refused.

While party officials say the formal request came from staffers worried about diluting resources by staging a conference a week before Polanski tries to win Keir Starmer’s former Commons seat, the Guardian understands the party leader wanted this to happen.

Exclusive: UK’s Green parties could take 40 seats if result replicated at next election, according to Labour-linked thinktank

The Greens are just four points behind Labour in urban constituencies across the UK, putting them within touching distance of taking as many as 40 seats if the result was replicated at the next election, according to new polling by a Labour-linked thinktank.

The survey by ThinkLabour, which has extensive links to Andy Burnham’s government, finds that urban voters have moved in large numbers towards the UK’s Green parties since the 2024 general election. The research highlights the challenge Labour faces in holding on to the Holborn and St Pancras seat in the face of a challenge from Zack Polanski, the party leader in England and Wales, at next month’s byelection.

Party leader, who will contest Starmer’s former seat of Holborn and St Pancras, says gas drilling has come up on doorstep

Zack Polanski has said a vote for him in the upcoming Holborn and St Pancras byelection is a vote against the government’s reported plans to greenlight a North Sea gasfield.

The leader of the Green party in England and Wales, who was selected on Friday to contest the London seat, also said he was considering building a personal stockpile for the extreme weather predicted with the arrival of the biggest El Niño in 1,000 years, a meteorological phenomenon that supercharges floods and droughts.

Keir Starmer won power but never explained Britain’s crisis. The new MP for Makerfield offers a sharper diagnosis – and one that voters can understand

Political careers often end when circumstances demand qualities that a politician cannot supply. That seems especially true of Sir Keir Starmer. On Monday, he stepped down as Labour leader, hours before Andy Burnham arrived at Westminster to take his seat as MP for Makerfield.

Sir Keir’s achievements were real. He won a large parliamentary majority in 2024, provided more cash for the NHS and was steadfast in his support of Ukraine. He undoubtedly restored a measure of seriousness after years of Tory psychodrama. But the 2024 victory was always more brittle than it seemed: Labour’s vote actually fell from 2019 and Nigel Farage’s decision to stand candidates in 2024 fractured rightwing votes. Sir Keir won power; he did not change the political weather.

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If the Makerfield MP is to be our next PM, he needs some immediate and memorable cost of living policies to avoid his predecessor’s fate

Pause here before we rush headlong into the turbulent future. Stop and inhale last week’s rare political triumph, revel in the sunshine of cheery optimism. It was a precious but unfamiliar sensation when life on the progressive side of politics in Britain is so often a litany of hopes dashed and disappointments.

Andy Burnham’s comprehensive victory in the Makerfield byelection, surpassing expectations, was a precious moment. He demolished £5m-Nigel Farage’s party of loathsome Reformers, whose every election candidate seems more repugnant than the last. Hostile hard-right politics in Britain needs defeating time and time again, every time nativists and hate-stirrers – from Enoch Powell to the BNP – erupt in our politics.

In just 48 hours, the PM has felt the weight of political gravity and shifted from initial adamance he would fight on

Rapid change has hardly been unusual in British politics in recent years, but the change of tone from Keir Starmer and his supporters in just 48 hours has been striking – and appears to chart the shift in his position on his own future from one of defiance to glum acceptance.