I've long favoured some form of federal structure for the UK. The covid situation has shone a light on some of the problems with the current state of devolution where Scotland, Wales and NI each have devolved powers but England doesn't so the UK parliament and government are having to directly deal with purely English matters. We've had several briefings from the UK Prime Minister (and other ministers) that only apply to England and are irrelevant (and often misleading) to the rest of the UK.
I'm Scottish and my partner is English and I don't see a need to drive a border between our countries after all we have more in common within the nations than that which divides us. We can all retain a strong identity as nations but remove unnessary barriers- it's why I voted to remain in the EU.
I think a structure with Scottish and Welsh Parliaments (and NI too - unless a unified Ireland was their prefered choice) plus a suitable number of English regional Assemblies/parliaments with Westminster only dealing with international and major national policy (eg defence) would be a good thing for the country. It could be 5 regions (North, Middle, Bottom Left, Bottom Right and London) or something more nuanced (Borders, North, East & West Midlands, Anglia (ish), South East, South West(ish) and proper South West (Devon, Cornwall) - whatever was their choice
The way opinion here seems to be moving on Independence (the shambolic handling of Covid and Brexit by the Tories is seen by many as a pretty convincing argument for Indpendence) some form of federal stucture (or a properly balanced devolution arrangement) may be the only saving of the Union