In a blow to Greek hopes, the European Commission dismissed the No vote as nothing more than a "signal" because the poll was "neither legally nor factually correct".

Mr Dombrovskis, the Latvian official responsible for the single currency, said any prospect of writing down Greece's €380 billion debt mountain - a key Syriza demand - was now "off the table". The vote "dramatically weakens the negotiating stance of the Greek government", he said.