[ben_w]

> Isn't this basically an internal coup?

Kinda, but the coup was because Starmer is polling badly, and in the local elections he performed badly.

> That said I fail to see the point of him being replaced, the next person won't do any better.

It would be difficult to do worse, but not impossible. (I bet a Labour version of Truss exists, whoever they are I hope they don't win).