One thing :
If a country applies to become member of EU, the current members can put a VETO, and refuse his demande.
(@Molly i agree, UK has a special treatment and i don't consider them as real EU member)
So, if UK stays in EU but Scotland declare his independance, then scotland would never be able to join EU till "UK" accepts it. (SO scotland would be a bit fuck
)
(same for barcelonna independance with spain)
BUT, if UK vote to leave EU, and then, Scotland become independant, then scotland will for sure join EU, (i don't think any other member-country will put a VETO)
In my opnion this VETO thing from EU-members is quite good, because i really hate the Independantist claimer.
Even if i don't know the topic, i'm sad to not see anymore the "Yougoslavia"