Week of leadership jostling has left Keir Starmer looking vulnerable and short of time – even though no challenger has officially come forward

Health Secretary Wes Streeting resigned Thursday, setting up a potential contest with the embattled prime minister. Others could jump into the race, too.

After days of upheaval, an official leadership challenge is on the cards, with the mayor of Manchester, Andy Burnham, making another bid to return to Westminster as an MP.