Scottish Conservatives win Aberdeen South by-election, first Westminster gain since 2024

Douglas Lumsden won Aberdeen South for the Scottish Conservatives on 18 June 2026, taking the seat from Labour. It is the party's first Westminster by-election gain since the 2024 general election and its first such victory in Scotland in recent memory. For a Conservative party reduced to a single MP after 2024, a by-election win — fought under intense scrutiny — offers validation distinct from holding a seat at a general election.