The leaders of all three main political parties are to join a mass post-Olympics exodus from the UK.

David Cameron, Nick Clegg and Ed Miliband are all taking their cue from the closing of the London Games to take overseas family breaks.

The Prime Minister is reported to be heading to Spain while Deputy Prime Minister Mr Clegg is also travelling to the popular Mediterranean tourist destination for his traditional two-week sojourn with his wife's family.

Opposition leader Ed Miliband is keeping the Olympic theme going by spending a fortnight in Greece. Foreign Secretary William Hague will take charge of the day-to-day business of government in the absence of the coalition's party leaders.

Mr Cameron, who attended a series of events at the Games, said yesterday that he needed a holiday as much as anyone, as he defended the timing of his departure at a press conference celebrating the success of London 2012 and outlining work to ensure long-term benefits.

"I am a great believer that politicians are human beings and they need to have holidays," he said.

"I don't call it annual leave, I call it a holiday and I am looking forward to having a holiday. If you don't think politicians ought to have holidays I think you need to have a serious think. But I'll be back for the opening ceremony of the Paralympic Games."

He said the Olympics had proved that the UK's "time has come" as he sought to harness the feel-good factor generated by Team GB's huge medal haul to efforts to drag the UK out of the economic mire.

"You only need two words to sum up these Games: Britain delivered," he told reporters. "We showed the world what we are made of, we reminded ourselves what we can do and we demonstrated that you should never ever count Team GB down and out. We in this country are going to make sure that these are not just Games that made history but the Games that helped to shape our future.

"Over the last couple of weeks we have looked in the mirror and we like what we have seen as a country."