If the prime minister had resigned after last week’s Gorton and Denton by-election defeat – as his critics demanded – it would be David Lammy leading the country’s response to America’s military operation against Iran, says Victoria Richards W hat a difference not even a week has made for the prime minister . It’s hard to believe that, little more than 72 hours ago, Keir Starmer ’s leadership was as good as in the ground, turned to dust by the Gorton and Denton by-election in which Labour lost