Labour candidate Sagal Abdi-Wali, leader of Camden Council, secured the Holborn and St Pancras by-election on 8 October 2026 with 45.2% of the vote against Green Party leader Zack Polanski’s 32.8%, producing a 12.4-point margin of victory. The seat, vacated by former Prime Minister Keir Starmer, has been held by Labour since 1983; Abdi-Wali benefited from established local party infrastructure and a positive, issue-focused campaign on housing and community matters. Polanski’s energetic challenge delivered a 22-point swing to the Greens but fell short amid split opposition votes and 38.8% turnout. Trader consensus on the 10-15% Labour margin reflects these verified results, though late swings in turnout or unexpected consolidation behind non-Labour candidates could have altered the final spread in a lower-turnout contest.