European finance officials have discussed as a worst-case scenario limiting the size of withdrawals from ATM machines, imposing border checks and introducing capital controls in at least Greece should Athens decide to leave the euro.

EU officials have told Reuters the ideas are part of a range of contingency plans. They emphasized that the discussions were merely about being prepared for any eventuality rather than planning for something they expect to happen - no one Reuters has spoken to expects Greece to leave the single currency area.

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The discussions have taken place in conference calls over the past six weeks, as concerns have grown that a radical-left coalition, SYRIZA, may win the second election, increasing the risk that Greece could renege on its EU/IMF bailout and therefore move closer to abandoning the currency.