This is a list of parliamentary by-elections in the United Kingdom since 2010, with the names of the incumbent and victor and their respective parties.
As of March 2024, six petitions have been held under the Act, four resulting in by-elections and one being terminated early due to the MP's resignation.
Five by-elections happened due to the deaths of the incumbent MPs, three of whom represented the Conservatives and two Labour.
The Conservatives, the party Bercow had represented before he took up the speakership, regained Buckingham and won Bassetlaw from Labour as well.
At the dissolution of Parliament in 2017, one seat was vacant: that for Manchester Gorton, caused by the death of its Labour member Gerald Kaufman.
[47] With the close proximity of the 2017 general election on 8 June, the by-election previously called for 4 May had its writ cancelled by the House of Commons.
Fourteen were in constituencies held by Labour, four by the governing Conservatives, one by their coalition partners the Liberal Democrats and two by Sinn Féin, who do not take up their seats in the House of Commons.