By-elections in safe seats usually feel predictable. This one isn't. When former prime minister Sir Keir Starmer stepped down from Parliament, he left behind Holborn and St Pancras, a north London constituency Labour has clutched tightly since 1983. Now, Green Party leader Zack Polanski is jumping into the ring to fight for it.
You're looking at a high-stakes October 8 contest that could reshape the entire British political map. It forces voters to weigh a newly reorganized Labour Party under Prime Minister Andy Burnham against an aggressive, insurgent left flank. If you want to understand where Westminster is heading, look right here.
The Backstory Behind the Holborn and St Pancras Contest
Labour has owned this territory for decades. Frank Dobson held it for years before Starmer took over in 2015. But things shifted dramatically during the 2024 general election. Starmer won the seat with nearly 49 percent of the vote, yet independent challenger Andrew Feinstein captured close to 19 percent, and the Green candidate pulled over 10 percent.
Discontent was brewing long before Starmer resigned from the Commons. Local voters in Camden have watched housing costs soar and public services stretch to breaking point. When the Financial Times spoke with residents ahead of the contest, indecision was rampant. Some saw Polanski as a breath of fresh air who brings genuine pressure on Westminster. Others dismissed him as an opportunistic outsider who cycles in from Hackney rather than moving into the local community.
Labour isn't leaving anything to chance. They've put forward Camden Council leader Sagal Abdi-Wali as their candidate. Abdi-Wali grew up in the borough after arriving as a child refugee from Somalia. That deep local footprint matters in a constituency where grassroots connection is currency.
What the Green Party Stands to Gain and Lose
For Polanski, this campaign is the ultimate referendum on his leadership. Since taking the helm of the Greens, he's steered the party in a sharp, populist direction. Supporters credit him with forcing mainstream parties to adopt tougher stances on rent controls and utility bills. Critics, meanwhile, point to controversies and fluctuating national polling numbers.
Winning a seat like Holborn and St Pancras requires more than just momentum. It takes a coalition of disillusioned former Labour voters, renters tired of empty promises, and progressives looking for a strong voice in Parliament. Polanski has openly called the Greens underdogs in the race, but he insists the energy on the doorsteps is real.
On the other side, ITV News notes that Prime Minister Andy Burnham visited the constituency immediately to back Abdi-Wali's launch. Burnham needs a solid win to prove his administration can maintain a grip on Labour's historic heartlands during a midterm period that traditionally punishes the party in power.
What Happens Next
The campaign trail is heating up fast. Polling day is set for October 8, 2026. Whether voters choose a local leader with deep community roots or a high-profile party chief promising disruptive change will send a clear message to Westminster.
Check your regional electoral registration office or official voter information portals for updates on polling logistics, and watch how the major parties adapt their strategies in the final weeks.
Greens' leader Zack Polanski selected in by-election for Starmer's
This video provides additional context regarding Zack Polanski's selection as the Green Party candidate for the upcoming parliamentary contest.
