1) Although this would be the bluff of the century on the part of the London parties, and although we know that as soon as there was a Yes vote they would reverse their position and seek a currency union in their own interests, the Yes campaign should be all too eager to take the announcement at face value. Blair Jenkins and the SNP should point out time and time again that this is bullying behaviour by London, taking action that could harm the economic interests of England and Wales out of sheer spite against Scotland and our desire to govern ourselves. Where is London's much-vaunted "love for Scotland" in this vindictive attempt to deny us access to a shared asset?
2) The Scottish government should announce that the London parties are welcome to reverse their self-destructive position at any time, but that if they don't, an independent Scotland would move ahead with either a nominally independent Scottish currency (still called the pound) pegged on a 1:1 basis with sterling, or with the use of sterling outside a formal currency union. Either option would maintain the sense of continuity that voters are seemingly seeking.
3) The Scottish government should announce that because Scotland will be denied access to the important shared asset of sterling, the share of the UK's debt that we will be prepared to accept will be significantly reduced. I emphasise 'reduced' - I doubt if it will be credible to say that we will take on none of the debt at all, but voters' sense of fairness will lead them to concur that there must be a quid pro quo (no pun intended) for London keeping one particularly important shared asset to itself.