Well, good luck with that, especially considering how Brexit is a massive power grab by Westminster (including what is perceived as taking some powers away from the devolved governments) and how they keep banging on about sovereignty and taking back control and negotiating as equals. When the UK wants sovereignty and take back control from the EU that's good, but when Scotland wants the same from the UK that's bad? You've shot yourselves in the foot there......
Also, I don't see why/how the EU should reject membership to an independent Scotland, provided it fulfils all the criteria (which could get interesting, as at the moment the SNP wants to keep the £, which probably won't fly with the EU. But then again, that can change).
Continuing to dismiss Scottish calls for another independence vote outright could be “counterproductive,” the memo said. Possible counter-measures include London handing more power to Edinburgh and ratifying a new settlement through a popular vote, and pressuring the European Union to nix the idea of Scotland rejoining the bloc as an independent country.U.K.’s Tories Start War Gaming to Stop Scottish Independence