Polling stations opened at 7:00 am across England, Scotland and Wales, with around 5,000 council seats contested alongside elections for the Welsh Senedd and Scottish Parliament. Starmer and his wife Victoria voted in London, while Reform UK leader Nigel Farage and Plaid Cymru chief Rhun ap Iorwerth also cast ballots early in the day.
Opinion polls predict strong gains for Reform UK and the Greens amid growing public frustration over living costs, immigration and weak economic growth.