The UK Gov could probably nip this all in the bud without even requiring a legal case. If they gave additional powers to the Scottish Parliament e.g. drugs legislation fully devolved, some powers on immigration (perhaps a Scottish Home Office?), energy policy, benefits and full tax-raising powers. Would that sway enough ‘soft’ Yes voters and put the ball firmly in the Scottish Govt’s court (becomes increasingly difficult to “blame Westminster”).
If they gave that option then perhaps the constitutional debate would die down for the foreseeable.
And yes, I know, it’s straight from the Gordon Brown school of thought.
Other (potentially chaotic) direction would be to add further options to the ballot
• Yes to independence
• No to independence
• Further powers for the Scottish Government
• Scotland (within UK) allowed to rejoin EU (EU-Greenland equivalent)
• Abolish devolution to Scotland…it’d be interesting to see if MPs/MSPs from any of the main parties would campaign for this (I wouldn’t put it past Rees-Mogg)