Precisely Dick although I would think that their fear of the UK falling apart in the event of Brexit is a main consideration - as the article alludes to:
"Look what happened at the last referendum we had, on Scotland. We nearly lost Balmoral and the shoots. Nicola Sturgeon could be sat in that castle now – we know she had her eye on it – it was a damn close-run thing."
Of course the article could be an April Fools joke!!
With quotes like that, of course it is.
The Queen OWNS Balmoral, not the state, so they didn't nearly lose it at all