The Prime Minister has just landed in Mexico for the start of the G20 summit of world leaders which will be dominated by the fallout from the election in Greece.
David Cameron held a post-result conference call last night with the leaders of Germany, Spain, Italy, France and the European Union and European Commission.
The Italian Prime Minister was already in the air heading for the G20. The French President and German Chancellor were still in their own countries assessing the result from Athens.
Mr Cameron urged the political parties in Greece which are now trying to form a government "not to delay."
The British government is expecting pressure to be piled on Angela Merkel, the German Chancellor, at the G20 from the USA and other countries which have contributed to the IMF bailouts.
They want her to agree to further banking and economic union which is very unpopular with voters at home.
Many G20 leaders fear the euro crisis could become a global crisis and they want to use this summit to stabilise the situation in the single currency.
David Cameron commenting on the Greek election said: