Goldman Sachs broached the subject of a default in a note published on Monday, claiming that the country could be forced into drastic measures amid fears that it will miss a €305m (£220m) payment due on Friday to the International Monetary Fund.

It will be "very challenging" for Greece and its creditors to reach a deal to unlock the final €7.2bn of the country's bailout aid, said the bank's chief European economist, Huw Pill. Warning that Greek government cash reserves were nearly exhausted, Pill said new elections could be triggered in Greece, alongside a debt default and limits on removing cash from banks.

"Facing this reality, a new political mandate­­ and thus a new government, a referendum or new elections ­­ will be required in Greece," he said. "Not only is it possible that we may need to see sovereign technical default and/or blocked Greek bank deposits in order to come to an accommodation between Greece and its official creditors, it may be necessary to do so in order to break the current impasse in negotiations."
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