When Theresa May announced her intention to resign, she limped on until her successor was chosen.
If Starmer does go, Reeves will not survive as Chancellor. If Rayner gets the job, Reeves won’t even be in the Cabinet.
It is an open secret that Rayner feels aggrieved at having to resign over a property issue, while Reeves stayed in post even after it was revealed she had been letting out a flat illegally.