British premier says Labour must focus on Thursday by-election, not leadership contest (opens original article in a new tab)

British premier Keir Starmer urges Labour to focus on Thursday's by-election rather than leadership contest, vowing to oppose any challenges to his leadership.

• British premier Keir Starmer says Labour should focus on Thursday's by-election
• Starmer urges party to concentrate on mayoral by-election if Andy Burnham wins parliamentary seat
• Starmer pledges to fight any leadership challenges