Northern Irish people are allowed to become citizens of the Republic of Ireland, under Irish law, and the Scots could of course choose to do something similar. There's nothing under UK law preventing dual nationality- I have dual citizenship with Australia- and there's plenty of precedent with Irish independence.
I'm very much undecided about this vote as, quite simply, I don't feel there's enough access to enough information to truly understand the implications. The conversation is being dominated and led by the anti-EU lot, who are spending too much time on unimportant matters like "sovereignty" and immigration and not enough time on the actual real-life implications of leaving.
The anti-EU lot seem to be claiming that everything would be the same as always. We'd get all the benefits of the EU- free trade, free movement (for us)- but none of the responsibilities of paying for it. I can't help but think that's a very fanciful position to take; it's not often one gets to have the milk for free without buying the cow first.
My gut instinct is to remain inside the EU, mostly because I think it would be a very bitter and messy divorce. There are quite a few things about the EU that I have big misgivings about, but I think we probably get more than we put in.
I'm certainly very concerned that the level of debate seems to be at "the Poles are stealing your job and your benefits". I'd like some genuine reassurance from the anti-EU lot that there will still be a job if we left. I'm not convinced.
I would like to see the various debates spend more time covering our sovereignty, our borders, migration and how only our elected government retains control over laws that are appropriate to the UK.
I wouldn't, as I consider most of those issues largely irrelevant to whether we should be inside or outside the EU. There's no such thing as true sovereignty in a globalised world: just look at google and Starbucks' tax affairs. And the real bete noire for the anti-EU lot- the Human Rights Act- was a UK law implemented by a UK government with no outside interference (and, in any case, is irrelevant as the ECHR and the EU are not the same organisation).