and on the verge of becoming Labour PM!
He will NEVER become a Labour MP.
Correct, both parties have stated more than once that PM and Finance Minister is not up for grabs. Aside from any layperson also seeing that is bizarre, for Seymour to grab a headline, shows he is not relevant anymore. If he ever was.
Only way he can become a LAbour MP is to join the Labour party. He can be a coalition Minister or w/e but he still wouldnt be a Labour MP.