[DonaldFisk]

If the Scottish independence referendum had resulted in Scotland gaining independence from the UK (like Spain, then a EU country) and then applied to join, there might be a reason for Spain to worry, as that roughly mirrors the situation with Catalonia.

If there's another Scottish independence referendum, Scotland would gain independence from a NON-EU country (UK) and then apply to join. This is similar to the situation with Slovenia, which gained independence from Yugoslavia and then joined the EU. Spain didn't veto that.

[Kliment]

It's also possible that Scotland's independence happens before or simultaneously with the UK's exit, in which case Scotland could remain a EU member by continuity. This would also be a good lifeline for the rest of the UK once they recover from their spell of madness - form a union with Scotland to sneak back in.

[adwf]

Another possibility is that we might have to hold an early general election now that Cameron has resigned. If the Conservatives lose, it's possible that the referendum loses it's legitimacy.

Very slim chance though, seeing as it was mostly the Labour heartland that voted for Leave.

[jacquesm]

There is already talk about a second referendum and a ton of support is behind it.