Provided that Scotland remains part of this one Realm, stands under the Union flag and looks to the sovereign as the fount of law and justice, I see no difficulty in devolving just about every other exercise of power by government to the Scots. An annual precept paid by Holyrood to Westminster for defence, foreign affairs and justice, from taxes raised and collected in Scotland, would cover the essentials. Scotland would set her own income tax, corporation tax, national Insurance, VAT and duty rates, determine how property-based taxes are to be levied and enjoy licence income from coal, oil and gas extraction both on land and in a 200 mile coastal economic zone.
Scotland would pay from such taxes for health, education, welfare, pensions, police, fire, transport (including rail subsidies) and all local services. Why not? And as the national debt is a UK sovereign debt, Scotland would have a joint responsibility for this along with other constituents of the Kingdom.
Wales should enjoy similar arrangements. As should England through the quadrarchy of Northumbria, Wessex, Anglia and Mercia. Such arrangements would mean we wouldn't need an English parliament - the six parliaments of Great Britain between them dealing with the bulk of government. Westminster would remain as a sovereign parliament to regulate justice and foreign affairs, administer defence, immigration and citizenship, air traffic control and the like. And of course to administer Northern Ireland, which is a province, and the UK's other dependent territories.
Only such bold thinking will free us from the Mandarinate and the central State's pernicious political class; only such radical measures will put the terms of our relationship with the EU on the agenda, and only such progressive measures will bring true Localism to Britain.