Keir Starmer Resigns as MP, Green Leader Zack Polanski Expected to Challenge in By-Election

Keir Starmer resigned as the Labour MP for Holborn and St Pancras on September 2, 2026, the day Parliament resumed after the summer break. His resignation has prompted speculation about a by-election, with Green Party leader Zack Polanski expected to run for the seat. Starmer stated he would focus on international affairs, including defense, security, trade, and technology. The Green Party has suggested Polanski has long desired to become an MP, and he previously indicated he would 'almost certainly' run in a future by-election. Political analysts are observing the dynamics of the constituency, noting its significant non-white voter base and young population, which have shifted from Labour to Green in recent years. Andrew Feinstein, an independent candidate who nearly defeated Starmer in the last general election, expressed support for a coalition with the Greens to prevent a Labour win. Additionally, Nigel Farage and Rupert Lowe confirmed their candidacies for the by-election representing Reform and Restore Britain, respectively.