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. Labour has held the seat continuously since its creation in 1983, providing a strong base despite national political shifts. Zack Polanski’s 24.5% reflects the Green leader’s confirmed candidacy and the party’s improved local performance, including strong results in the May 2026 Camden council elections across the constituency’s wards. Other declared or potential candidates trail at low single digits, consistent with limited visibility and weaker organisational support. The contest remains a Labour–Green contest pending Labour’s candidate selection on 9 September and the eventual by-election date.