Scottish independence: How would 'devo max' affect economy?

The governor of the Bank of England, Mark Carney, has suggested a currency union between an independent Scotland and the rest of the UK would not be possible.

It is the preferred currency option for the Yes campaign, if voters choose independence.

Meanwhile pro-Union party leaders have announced their backing for more powers for Scotland.

Robert Peston looks at how so-called devo max would affect the economy.