2026 Aberdeen South by-election

Common card · No. 281752

A by-election for the United Kingdom parliamentary constituency of Aberdeen South was held on 18 June 2026 following the resignation of Stephen Flynn, Member of Parliament (MP) for the Scottish National Party (SNP), upon being elected to the Scottish Parliament. It was won by Conservative candidate Douglas Lumsden in the party's first gain at a Scottish by-election since 1967, and the first time ever, in the UK party's history, that it had won any parliamentary by-election from third place. Flynn resigned after having been elected as a member of the Scottish Parliament (MSP) at the 2026 Scottish Parliament election on 7 May; the Scottish Elections (Representation and Reform) Act 2025 prohibits individuals from serving simultaneously as an MP and an MSP. The vote was one of three Westminster by-elections taking place on the same day; the others being in Arbroath and Broughty Ferry and in Makerfield.

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