When the SNP transited smoothly from “we’ll use to the Euro” to “we’ll use the pound” that was a campaign tactic.
I do not believe either the Yes Scotland or the Better Together campaigns have really thought this through: or at least, they are certainly not making a fact-based argument based on having thought this through.
“Hardball” is the macho cliche being applied to the Chancellor’s fiat towards a currency union. Despite its protestations, Mr Darling’s team pursues the kind of negative campaigning that never goes out of style in Westminster. No compunction is involved. The referendum must be won at all costs. But what might that cost be, exactly, if the prize is a united kingdom in the aftermath?