Labour always used to win the majority of parliamentary seats in Scotland, but the Scots kept getting lumbered with Tory governments. Being smart people, the Scots realised that their best chance of getting a social democratic government was to elect their own government, and so the nationalist movement started to gather more and more support.
Blair tried to appease them with the halfway house that is devolution but, like much that Blair did, it was only partially successful (from the point of view of satisfying those who want independence that is, in terms of the devolved powers, the Scottish parliament has done a fantastic job imo).
The referendum and its result meant that Scotland, that voted remain, would be forced to leave against their will, and that has, imo, made the Scots even more keen on independence.
Plus they don't want to keep our bloody nuclear submarines at Faslane any more.
I'd move to Scotland in a heartbeat if I could persuade DP to live hundreds of miles away from his family. He's slowly coming round to the idea. If he doesn't go for it, I may just have to start a campaign for independence for Brighton, Hove, Mid-Sussex and Lewes district, all of which voted to remain in the EU.