The Chancellor could not have been clearer in Scotland today. There is and never will be any "legal reason" - or any other reason, why the rest of the UK would want to share sterling with an independent Scotland, as Scottish ministers have proposed.
This analysis was backed by Labour and the Liberal Democrats.
For a report on this read here: http://www.bbc.co.uk/news/uk-scotland-scotland-politics-26166794
What the currency will be Lord knows, and the SNP certainly do not.
To read the debate I was in yesterday where the SNP behaved terribly see here: http://www.theyworkforyou.com/whall/?id=2014-02-12a.292.1&s=speaker%3A24962#g301.3
