Scotland is not part of the UK because it was "conquered & occupied by a larger neighbour". The King of Scotland became King of England as well, uniting the kingdoms. Hence the term "United Kingdom".
I welcome Scotland leaving the UK, if they really want to go. It'ld be great. I'ld save 8p a pound on income tax, and England would have a solid Conservative majority. Devolution can't happen fast enough for me.
The only good thing to come out of England is the road to Scotland.
Nemo me impune lacessit