If by "that sort of behaviour" you mean the sitting MP deliberately standing down so that a big name with big ambitions can be parachuted into parliament, then they may not like it. In my scenario, that is what Starmer is banking on, secretly wanting Burnham to lose (which is why he "backs" him)! However, the media and the Burnham machine will throw a lot of mud at the local Reform bloke, some of which will stick, and with Restore already on seven percent, chipping away at Reform from the right, Burnham could still win, unless the Greens get their act together and attack from the left!
!ALIVE
!BBH