So, the debate has been hotting up this week, with much discussion over what currency would be used by Scotland if we gained independence. Basically, there are three options: 1) Use the Euro. Not really a popular one, and no longer favoured even by the SNP. 2) Set up our own currency. I am not sure what such a currency would be, but apart from the inadvisability of using anything that could be called the "Pound Scots" (which was the old Scottish currency before ...