As anounced by their foreign minister, Spain will veto the direct entrance or "remain" option of an independent Sotland to the EU; albeit they will consider it if they exit it, and try to enter it by convencional means, which is much slower. English news: https://www.theguardian.com/uk-news...ent-scotland-would-be-at-the-back-of-eu-queue Spanish news: http://www.lavanguardia.com/politic...na-avisa-excocia-pedir-ingreso-ue-brexit.html This is posible, as all state members have a say. And with its independece problems, Spain does not want any positive example. Not even Gibraltar. Even so, they will not oppose in the Ulster matter, they want a special transit permit (despite being inside UK), or if they want to become Irish.