Scotland has it's own Parliament.
When my wife and I did the train tour of Scotland I saw a land that looked and acted more like Appalachia than a prosperous nation state, Scotland would be like Maine leaving the Republic- too small a people and economy for true Independence (Scotland is 1/3rd the Land mass but only 1/8th of the population of the UK.) Practically they would still need England to maintain any sort of economy that didn't plunge the nation back into the 1800's without the industrial base of that time.
I get the feeling it is more like Texas in the feeling of unique but not really wanting to be separate.
"Groups with guitars are on the way out, Mr. Epstein"
Dick Rowe, A & R man