Keir Mather becomes youngest MP in Commons after Labour’s historic Selby win

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. Keir Mather will become the ‘baby of the house’ as the youngest MP in the Commons. In his victory speech, he said that ‘thousands of votes were in Labour’s box for the very first time’ and declared: ‘In this campaign we have rewritten the rules on where Labour can win.’ Mather, a former researcher for the shadow health secretary, Wes Streeting, and who was named after the first leader of the Labour party, Keir Hardie, won by 4,161 votes
Full story: Labour routs Tories in Selby and Ainsty but falls short in Uxbridge
Byelection results: live updates