I am wondering why someone - English or some other nationality - who isn't entitled to vote should have a view?
We get this Canard in Canada a lot in re: Quebec. "It should be Quebec's decision, and Quebec's alone", or some such.
Well, maybe Quebec will be the only ones to vote, but people in the rest of Canada have views, and the people of Quebec aren't so foolish as to leave them unconsidered. In short, Quebec might be able to vote to separate, but it'll only be in negotiations with Canada afterward where the terms are laid out.
The Separatists in Quebec tell the people all sorts of foolish nonsense: "You can keep your Canadian passport and we can continue to use Canadian currency if we choose (as banana republics choose to use $US), but we'll have none of Canada's national debt. We will automatically gain entry into all of Canada's free trade deals and a seat at the G-8 despite having an economy a third the size of Australia's. Canada will continue to transfer billions of dollars into our province every year because they still like us. And yes we can vote to separate from Canada because we can, but no the people of the Island of Montreal can't vote to stay in Canada no matter how much they want to, because they can't." And so on.
And the rest of Canada just kind of shakes its head and laughs, knowing that won't be the way it goes down.
Voting "yes" in any separation referendum is a very risky gamble unless all the terms with the larger power have been agreed in advance. Anybody who thinks that England is just going to say "we'll do this on your terms" is out of his mind.