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 Lib Dems 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, with the Liberal Democrats also unseating the Tories in the previously safe seat of Somerton and Frome.

But in the one glimmer of hope for the Conservatives, they held on to the Uxbridge and South Ruislip seat formerly held by Boris Johnson, fending off a predicted Labour win by just 495 votes.