**Sagal Abdi-Wali leads the market at 71% as the clear frontrunner for Labour’s nomination and the seat itself.** Labour has held Holborn and St Pancras continuously since the constituency was created in 1983, most recently with Keir Starmer securing a comfortable majority in 2024 despite a reduced vote share. Starmer’s resignation on 1 September 2026 to focus on international affairs triggered the by-election, with the writ expected to lead to polling in October. Abdi-Wali, Camden Council leader since the May 2026 local elections and former chair of the local Constituency Labour Party, emerged as the standout Labour candidate. Applications closed on 4 September, with selection scheduled for 9 September; her local roots, refugee background, and community ties position her strongly in a seat with a significant Somali community. Other Labour figures have been mentioned but trail in reporting. Zack Polanski, Green Party leader, announced his candidacy on 3 September and is expected to secure the nomination locally. The Greens finished third in 2024 (around 10%) and placed second in the 2026 Camden council vote share (27%), giving them a base to target the seat. Bookmakers price Labour heavily as favorites (around 1/4 to 2/7) with the Greens at longer odds (around 3/1), reflecting the structural advantage for the incumbent party despite Green momentum and recent local gains. Other declared or speculated candidates, including Workers Party and independents, remain longshots. The outcome hinges on Labour’s final selection, Polanski’s confirmation, and turnout dynamics in this left-leaning London constituency.