This Commons Library briefing paper presents an overview of UK election results since 1918. It provides summary results for all elections from 1918 to 2021, giving more extensive details about UK general elections. It also includes elections to the European Parliament, devolved legislatures and local government.
The 2021 Senedd Cymru/ Welsh Parliament elections took place on 6 May. The largest party was Labour, winning 30 seats. The Conservatives made the largest gains and replaced Plaid Cymru as the second largest party.