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Keir Starmer announces he is standing down as MP
Starmer said he will focus on international affairs and violence against women and girls after 11 years in the seat, triggering a by-election.
On Tuesday, September 1, 2026, former Prime Minister Sir Keir Starmer announced he will stand down as the MP for Holborn and St Pancras after 11 years, triggering a by-election in the London seat.
Conservative Party chairman Kevin Hollinrake labeled the resignation "another U-turn," noting Starmer previously pledged to remain in Parliament until the next general election after being replaced as Prime Minister by Andy Burnham in July.
Explaining his decision, Starmer said it was the "right time" to "pass the baton to a successor," adding he will focus on international affairs including "defence, security, trade and technology" and combating violence against women.
Labour holds the seat with an 11,572-vote majority, though the Green Party secured 10.4% of the vote in 2024, prompting interest from Green leader Zack Polanski in contesting the by-election.
The by-election will mark the sixth such contest this year as Prime Minister Andy Burnham prepares to address the House of Commons for the first time since taking office in July.