It's also a useful threat, so long as China's currency plans remain vague.
pic.twitter.com/1A6lkpr3d4 November 26 , 20138.47am GMT Nicola Sturgeon was pressed on her currency "plan B" in her Today programme interview earlier.
"The financial markets are listening to this" wasn't Darling's most inspiring line, but Salmond's belligerence over a currency plan B will probably linger.
In addition to economic benefits, Mr. Werner viewed the currency plan as a way of drawing European nations together to end conflict.
12.14pm GMT Labour's Anas Sarwar asks if the lack of a currency plan B in the Scottish government's white paper shows that it was a failure.
With Scotland's currency options again a significant issue, Salmond's officials were adamant that Darling's repeated attempts to skewer Salmond on his refusal to spell out an alternative currency plan had failed on this occasion.
After months of resisting all pressure to accept the need for an alternative currency plan – remember Nicola Sturgeon's remark in November that "our plan B is our plan A"? - Salmond's opponents believe the first minister is slowly shifting ground.
Speaking on BBC Radio Scotland on Friday morning, Salmond resisted heavy pressure to spell out his alternative currency plans by repeating that he would continue campaigning to force the UK parties to accept a sterling zone with the UK.
Their demands followed calls from prominent, neutral business leaders from the Scottish Chambers of Commerce and Institute of Directors for clarity on Salmond's alternative currency plans, increasing the Scottish government's isolation on the issue.
Osborne confirmed the Treasury was planning to publish a detailed critique of Salmond's economic and currency plans, and a detailed defence of the benefits of the UK to Scotland in coming weeks, as UK ministers seek to overturn a surge in support for independence following his currency veto in February.
Your bank may not give you the best deal on international payments, so it's a good idea to shop around for a specialist transfer provider that can be more transparent about its rates, as well as providing currency plans for business customers.
