Keir Starmer is having a torrid time. Today brings another poll showing his personal approval rating falling. The Labour leader is now down to a net score of minus 22. But Starmer’s leadership, or lack of it, is far from being Labour’s biggest problem.

The party’s fundamental issue is that its old electoral coalition has fallen apart in recent years; the 2014 Scottish referendum and the 2016 Brexit referendum detached large sections of the party’s traditional base from it.