Boris Johnson urged to make comeback after Liz Truss resigns | First Thing

Former PM dominates debate as contest to replace Liz Truss begins, only six weeks after he left office. Plus, the lettuce that outlasted Truss

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Good morning.

Liz Truss has resigned as Britain's prime minister and will step down after a week-long emergency contest to find her successor, she announced outside Downing Street, leaving the possibility of a return of Boris Johnson.

Who else is running? Several Tories have come out in support of Rishi Sunak as the successor to Truss. Kemi Badenoch, Suella Braverman and Penny Mordaunt are also expected to stand as leadership candidates.

Could Johnson really return? I wouldn't want to make any cast-iron prediction in this crazy world of politics at the moment but I think Boris Johnson returning is a very real possibility," said the founder of the ConservativeHome website, Tim Montgomerie.

What did he say about aid to Ukraine? He said members of his caucus were starting to question the money Washington was sending to Ukraine to help it fend off Russia's invasion. Ukraine is important, but at the same time it can't be the only thing they do and it can't be a blank check," he told Punchbowl.