Scotland's future: Carney warning on Scots pound plan
29 January 2014 Last updated at 23:47 GMT
An independent Scotland would have to give up some of its powers if it wanted to keep sterling, Bank of England governor Mark Carney has said.
During a speech in Edinburgh he used the Eurozone crisis as an example of what could happen if the "proper arrangements" were not in place beforehand.
But Mr Carney did say the bank would implement whatever decision politicians reached if voters in Scotland opted for independence.
Hugh Pym reports.