No one ever said Scotland is a region of England. Legally, like England, Wales and Northern Ireland, it's a region of the United Kingdom. You can waste all the time you like the stuff from wikipedia but until the Scots vote for independence, that's the situation.
Scotland is not unique in having a separate legal system within a larger country - Quebec has one but it's still part of Canada....until, of course, the Quebecois vote for independence.I suspect there are other examples, the Basque country, perhaps, or Catalonia. Live with the reality, Goatfell, not the wishful thinking.