EU referendum: who votes and about what?

[JRCT]

All residents of the UK who are on the voters roll.

As we are a family of nations, all four nations have to vote the same way for it to be a majority so if England vote to leave, Scotland, Wales or NI voting to stay in would veto it.

That's not true. It's just what Sturgeon wants. And the only reason she wants that is because Scotland would probably vote not to leave. Probably.

The UK is one EU member state, as was highlighted many times during the Scotland Indie campaign (ie. if Scotland had have gained independence, the Uk would remain in the EU (for now) and Scotland would have to apply to join).

So, in the eyes of the EU we are one nation, not four and if there was an in/ out referendum it would be a total UK vote that counted.