Well if the results are anything like the exit polls, this will be marked as the day the UK began to end. Scotland will not stop pressing for another independence referendum as all the assurances that they were sold by the union parties regarding the EU are now invalid. If Westminster don't allow it, we could see a copy of what happened in Catalonia, although I doubt it would die down again as easily in Scotland. Once Scotland is gone, the Union becomes completely pointless. Can't see Wales and N.Ireland staying if Scotland leave.
Whilst the rest of the EU is growing closer together, we are tearing ourselves apart form them and tearing ourselves apart from within. The current mood in British politics and the public is wholly destructive.