UK byelection results: Labour routs Tories in Selby and Ainsty but falls short in Uxbridge

Keir Mather, 25, is Selby’s next MP, as Labour narrowly fails to take Boris Johnson’s old seat of Uxbridge and South Ruislip and Liberal Democrats romp to victory in Somerton and Frome

• Byelection results: live updates

The Labour party has won its biggest ever byelection victory by overturning a 20,000-vote Conservative majority in Selby and Ainsty, sending a 25-year-old to parliament.

But Keir Starmer’s party failed to win Uxbridge and South Ruislip, Boris Johnson’s old constituency. The Conservatives held on to the outer London seat with a majority of 495, the only bit of good news in an otherwise miserable night for Rishi Sunak.