Sorry Doug, you're quite right, I slipped up there, replying too quickly. Unfortunately we can't help still having Charles. The crown is common to Scotland and England and the Commonwealth. Personally, being a republican, I would prefer to reject any connection with the crown but I suppose the SNP are being pragmatic. They don't want to rock the boat but I reckon it won't take too long to get rid of Charles at al after independence. Ireland did it and Australia is on the edge.
Jack, you can only have one United Kingdom if you unite two. If one leaves .... you have two separate kingdoms as was before the union of 1707.