Earlier quoted context omitted.
Highly unlikely. The EU generally negotiates as a bloc. It is almost inconceivable that there won't be some sort of trade deal between the EU and the UK and all of the EU would be party to it. It's probably worth pointing out also that, currently, the UK has a lot of wiggle room when it comes to its relationship with the EU just because of its size. It is very unlikely that Scotland will be given any of this both bec…
(I'm just playing along as devils advocate, with no skin in this game.) It could be said that Scotland wanting to stay would be politically super-popular with the EU, who strive to draw a sharp divide between the benefits of the EU and the costs of leaving. On the other hand, England could see the compromise where Scotland is its trade partner in Europe as a win-win too.
From the EU perspective, my own view is that if Sturgeon can find a way to persuade Scotland to go the full EU i.e. Eurozone, no opt outs and no rebate then I can definitely see Juncker finding a way to accommodate by doing some sort of quid pro quo with Spain. Whether the Eurozone economy will recover sufficiently (and/or the UK economy will tank sufficiently) to make that politically viable is anyone's guess.
For NI, if it wasn't for the super strong unionist movement, I'd say that there was a lot to be said for them going full EU: they're small, relatively poor, bordering Eire. But that's a really, really big if, probably enough to kill any real chance of it occurring in the next 20 years.