"it is absurd to suggest that because a vote was made once then there can never be another vote again"

And could you point out Allan C where on earth I have EVER said that?

"The point is that the people of Scotland will decide whether there should be another vote or not."

The "people" of Scotland will decide no such thing just as in the recent Independence referendum the "people" of Scotland decided nothing. It was and will be the electorate of Scotland that can decide if they want a referendum, but that should itself be decided by referendum that could be organised by the Scottish Parliament (Simple question: Do you want a referendum on Independence YES or NO) - not simply because it appears in one political party manifesto which 21% of the electorate sign up to and agree with. Should the electorate of Scotland decide that they want a referendum on independence then the Scottish Parliament and the Westminster Parliament will agree the terms under which the referendum will be conducted - just as they did the last time.

Musktwat may witter on about the Supreme Court but the Supreme Court does not trump Parliamentary Sovereignty ("The legislative body has absolute sovereignty, and is supreme over all other government institutions, including executive or judicial bodies").

The rest is pure waffle, partly convincing waffle but waffle nonetheless. Fact remains if you want to hold a binding referendum in the UK on any subject then that referendum has to be agreed to and sanctioned by the Parliament of the United Kingdom and that sits in Westminster.

Remind me again Musktwat/Allan Conn how many times has Westminster pulled the rug on the Northern Ireland Assembly?

"one scenario might be if a Tory/UKIP backed gvt seemed to be heading for the European exit door."

If memory serves me correctly, for the UK to leave the EU there has to be a referendum on it. So all any political party in power can do is put it to the electorate of the United Kingdom, so while a British Government may want to leave UK - they won't decide it. Should the electorate of the UK decide that the UK should leave the EU then that would happen within two years of a Government representative giving notice of our intention to quit, in which time the electorate of Scotland can press for whatever they like, but in that case they would be irrespective of what the SNP might tell the Scottish voters:
1. Outside the EU
2. Forced to create their own currency