The Tories and Reform had it easy when Keir Starmer was self-destructing – but a new PM with ideas exposes how vacant the opposition has become, says Guardian columnist Rafael Behr

Andy Burnham takes over from Keir Starmer in Downing Street, but he will have to address the UK’s core divisions

The new PM’s greatest task has long weighed down the left: convincing voters there are actually better days ahead, says Guardian columnist Frances Ryan