If the vote is YES the Prime Minister in office when independence takes effect (most likely to be Labour) would certainly have to resign.
If the vote is YES the Prime Minister in office when independence takes effect (most likely to be Labour) would certainly have to resign.
It's true that a Labour government would likely have a far smaller majority without the Scottish MPs, but when Labour has won, it has usually been with far greater majorities than that.
[1]That is, no clear majority, requiring a coalition government
I doubt it, if Scotland votes yes it'd probably cripple Cameron's career, not whoever becomes PM after the vote.
Long term, the Westminster system gravitates towards a two main party or coalition equilibrium. Scottish Labour will be gone. Maybe the Tories will pull right and cede some of the centre. Maybe Labour will pull right.