..and that's not forgetting the contribution of the selfish Scots Nationalists victory
virtually guaranteeing a perpetual tory domination of our tiny islands...

I can see the risk that it could risk a perpetual Tory domination of Southern Britain, but hardly of "our tiny islands" taken as a whole. Scottish independence would initiallu be likely to involve permanent rule on the basis of a relatively small proportion of votes, but I doubt if that would be accepted permanently by the Southern British public. I think it likely that a Scottish secession would trigger bitter anger among many towards the English party seen as primarily responsible for bringing this about, and demands for constitutional reform.