**Sagal Abdi-Wali leads trader pricing at 71% as the frontrunner for Labour’s nomination in the Holborn and St Pancras by-election triggered by Keir Starmer’s resignation on 1 September 2026.** The constituency has returned Labour MPs since 1983, giving the party’s eventual candidate a structural advantage despite recent local erosion of support. Abdi-Wali, Camden Council leader and a former child refugee from Somalia with deep roots in the constituency Labour Party, is widely viewed as the strongest local contender; Labour’s selection process closes applications on 4 September and chooses a candidate on 9 September. Green Party leader Zack Polanski’s 3 September announcement that he intends to stand has lifted his shares to 24.5%, reflecting Green gains in the May 2026 Camden locals (where the party took nearly 28% across the seat’s wards) and their third-place finish in 2024. Lower-priced candidates, including several other Labour hopefuls and minor-party figures, trail because the contest is expected to narrow to the Labour nominee versus Polanski once nominations close. The by-election date remains unconfirmed, but resolution will follow official results published by Camden Council.