Ake, the consequence of doing it is therefore a huge loss to Labour: Cameron is not going to do too much to stop them leaving, and the crash will be epic, as Scotland's too small to either stand alone or dictate its terms.
The alternative to not having the Pound and not having the Euro might just be not having any currency at all, which would mean a bankrupt government and barter.
It may be that if Scotland is a member of nothing its only option will be to take the pirate route, becoming a home for every tax policy in the book. That at least was the implication of Salmond's recent comment that if Luxemburg could do it, so could Scotland, conveniently forgetting that Scotland has a hundred times larger population that Luxemburg: to achieve a comparable standard of living would mean them becoming the biggest hole in the economy in the world, virtually selling out to the Russian mafia. Good luck, lads.