> If there was a referendum under the Tories and the vote was to come out then actually I think the Scots would have a pretty good case for a referendum on independence.
To what end though? It's the UK that's an EU member - not the individual countries in the UK - so if the UK voted to leave Europe then Scotland would be leaving, and would have to then a) vote for independence from the UK and b) re-apply to the EU to get back in to the EU, a process that could take many years.
The vote out of the EU should be held on the same basis as the 1975 vote to remain in the EEC. That was the first referendum that was held throughout the entire United Kingdom and it remained the only UK-wide referendum until the United Kingdom Alternative Vote referendum, 2011:
http://en.wikipedia.org/wiki/United_Kingdom_European_Communities_membership_referendum,_1975
Interesting to note the results of that referendum:
England 68.7%
Wales 64.8%
Scotland 58.4%
Northern Ireland 52.1%
i.e. the English were keener than the Scots to remain in the then EEC, and Northern Ireland nearly voted not to - not that it would have made any difference had it done so, given how the rest of the UK voted and the basis on which the votes were counted. Imagine if we had not remained in the EEC because Northern Ireland voted 49.9% instead of 52.1% above ...