That would avert a Scottish/N. Ireland border in the Irish sea and place it at the Scottish/English border instead! As far as I am aware there has been little discussion of such an option in Scotland and I doubt it would do much to appease Scottish Nationalists. Their claim is to full independence from the UK (much like the Brexiteer's claim to full independence from the EU) and is not primarily motivated by a Pro-EU sentiment - although that could change if the economic effects of Brexit are very severe in Scotland. One report I have read claims that Edinburgh and Cardiff are proportionately more dependent on the financial services industry than London.

Index of Frank's Diaries