It was triggered by the resignation of Sadiq Khan from Parliament following his election as Mayor of London.

[7] Alex Glassbrook, a local barrister and volunteer lawyer,[8] was the candidate for the Liberal Democrats.

[12] Bobby Smith, leader of Give Me Back Elmo and perennial election candidate, stood for his party.

[10][11] Former MP George Galloway had floated the idea of standing after his candidacy in the London mayoral election, but withdrew, citing fears of splitting the Labour vote and thus allowing the Conservatives to win.

[13][14] A two minute silence was held during the count, to commemorate Jo Cox, the MP for Batley and Spen, who was killed on the day of the election.