Living as I do, perforce, in England, it's funny as hell to see the genuine worry among the English now that they suddenly have to take seriously the possibility of Scottish independence. You get a lot of "we'd better off without you" bluster, but mostly they are just outraged at the thought - they think we are uppity servants suddenly talking about leaving and taking our stuff with us. The more thoughtful of them are also horrified by the prospect of endless Tory domination.
That said, I agree with a previous poster, that the Highlands would be treated by the Central Belt in just the way they complain about England treating them. For that reason, the Northern Isles have a nascent separatist movement...and i don't blame them.