If the UK leaves the EU (looking almost certain with the vote margin right now)... will Scotland get another referendum?
If it does, will Scottish independence win this time? Many of the Scots who voted to stay in the UK did so to keep the UK in the EU.
I think it's inevitable, and I think Scotland will leave the UK. Meanwhile Northern Ireland will have a closed border (Edit: I mean, not a free border, but one with customs, etc.) with the Republic, having been dragged away from Europe by Unionists. That won't cause any tension at all.
God help us all.