What will happen if Greece leaves the single currency?

As EU finance ministers have met to discuss the political crisis in Athens, Ed Balls has told BBC Radio 5 live's Shelagh Fogarty that Spain and Italy pose a bigger threat to the eurozone than Greece.

Nine days after the election, Greek politicians are still trying to form a working government.

The Shadow Chancellor has added that Britain should put more pressure on the European Central Bank to stop the contagion.

BBC Radio 5 live Breakfast asked the chairman of Lombard Street Research, Charles Dumas, and the currencies editor for the Dow Jones, Katie Martin, what would happen if Greece left the single currency.

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