Keir Starmer leaves Downing Street for the last time as Andy Burnham becomes prime minister

After becoming leader of the Labour party, Andy Burnham will officially become prime minister of the UK as Keir Starmer leaves Number 10. That many people considered this day an inevitability doesn’t make it any less momentous. Six years ago, Starmer inherited a Labour party that had failed to win four general elections and was battling a tarnished reputation. In the month he took over as leader, Labour were polling at 29%, 22 points behind Boris Johnson’s Conservative party. Starmer was…