With Keir Starmer under fire, it is Manchester’s mayor who looks to be the key challenger.

Andy Burnham, the Greater Manchester mayor, is known as the "King of the North," and his Labour backers will hope that moniker reaps rewards. | World News

With Keir Starmer under fire, it is Manchester’s mayor who looks to be the key challenger.

Andy Burnham is angling to become the UK's next prime minister. He has plenty of popularity, but no seat in parliament. That could be about to change.

The mayor of Greater Manchester is bidding to replace Keir Starmer in 10 Downing Street. What he does next is still being worked out.

Sir Keir Starmer confirmed that he would campaign alongside Andy Burnham in the crucial by-election