The question of sovereignty has never been resolved in Scotland.
Scottish sovereigntists are willing to share sovereignty with Europe, while the British unionists, by and large, are not. This accords with modern underestandings of sovereignty as something shared and divided, rather than a single thing which a nation does or does not have. This is very different from the Brexiter vision, which insists that all sovereignty must be concentrated in one place. It is the pursuit of this vision that has made the UK’s post-Brexit relationship with Europe so difficult. We know from other surveys that people who identify as strongly English are most committed to Brexit. Most English Brexiters would even accept the break up of the United Kingdom if that were necessary to achieve Brexit. Scots have lived in a union for over three hundred years so that shared sovereignty is part of the political culture, widely shared by both ‘nationalists’ and ‘unionists’. It is these different understandings of sovereignty rather than the question of where all the sovereignty should go that is at the base of the current impasse.