Anti-Israel Greens’ chief Polanski loses UK parliamentary election to Labour candidate

Controversial Jewish politician gets only 33% of vote for seat vacated by former prime minister Keir Starmer in central London, days after his party declared ‘Zionism is racism’

Britain’s leader of the Green Party, Zack Polanski, campaigns in London on September 12, 2026, ahead of the Holborn and St Pancras by-election to determine who will replace former prime minister Keir Starmer as local MP. (Toby Shepheard/AFP)
Britain’s leader of the Green Party, Zack Polanski, campaigns in London on September 12, 2026, ahead of the Holborn and St Pancras by-election to determine who will replace former prime minister Keir Starmer as local MP. (Toby Shepheard/AFP)

Andy Burnham’s Labour Party won an election for the parliamentary seat vacated by former leader Keir Starmer on Friday, fending off a strong challenge from the left-wing Green Party chief, Zack Polanski, in a boost for the British prime minister.

Labour candidate Sagal Abdi-Wali, the leader of the local council, won the by-election in the central London constituency of Holborn and St Pancras with 12,292 votes, or 45%, compared with 8,928 or 33% for Polanski, the Green Party leader.

Labour had been widely expected to hold the seat, as Burnham seeks to repair his party’s damaged appeal among core voters in big cities after two bruising years in government under Starmer.

While Labour’s main rival in national polls is currently the populist Reform Party, the governing party is seeking to shore up support among left-leaning voters who had turned to the Greens before a national vote due in mid-2029.

The result is a blow to Polanski, a Jewish, anti-Israel 43-year-old former actor and hypnotherapist, who has promised to make his party “an eco-populist” movement and draw support away from Labour — a strategy that had been working until Burnham came to power.

Abdi-Wali paid tribute to Starmer in her victory speech and said she wanted to work with Burnham on issues such as housing: “We have a responsibility to defend what we’ve built and pass it on,” she said. “Throughout our campaign, we chose hope, and the people of Holborn and St Pancras chose it with us. And now it’s time to deliver.”

Labour Party candidate Sagal Abdi-Wali (center) attends a campaign launch in London on September 12, 2026, for her run in the Holborn and St Pancras by-election to determine who will replace former prime minister Keir Starmer as local MP. (Toby Shepheard/AFP)

Starmer was replaced as prime minister in July and stood down as a lawmaker in September after losing the support of his Labour Party over a series of missteps, U-turns and disastrous local election results in May.

The Green Party had made record gains in London — largely at Labour’s expense — in May’s local elections, capitalizing on Starmer’s unpopularity.

But the Greens have fallen back in national polls since, after Burnham made several policy pitches that boosted Labour’s standing among voters to the left, including a tougher line on Israel and a more ambitious approach to relations with the European Union.

The result caps a damaging few days for Polanski, whose leadership of the Greens has been questioned after party members passed a Zionism is Racism motion to widespread criticism from Jewish groups, other parties and even most Green party lawmakers. The motion also got him barred from visiting Israel by the government.

Britain’s Green Party leader Zack Polanski attends a Green Party conference in Brighton, Britain, October 2, 2026. (Carlos Jasso/Reuters)

After the result, Polanski said he believed the displacement of Palestinian people was racist, although he declined to say that he supported the motion after not taking part in the vote last weekend.

He said early Friday that he was disappointed not to win the seat, but would stay on as Green Party leader, adding that the party would continue to grow despite the setback.

“So many people told me on the doorstep that they want to give Andy Burnham a chance,” Polanski told broadcasters. “Well, he’s got a chance now. Let’s see what he does with it.”

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