David Cameron and Boris Johnson's toughest test? A jigsaw puzzle meant for children

Video: It took the pair nearly ten minutes to finish a jigsaw

Prime Minister David Cameron and London Mayor Boris Johnson. (Toby Melville | WPA Pool | Getty Images)

It seems the combination of two top degrees from Oxford, with an Etonian education to boot, are not that helpful when it comes to completing puzzles designated for toddlers.

Fortunately, for most people of such a privileged background, coming across this realisation may happen in private. For David Cameron and Boris Johnson, the epiphany occurred in front of television cameras.

The Prime Minister and the Mayor of London were visiting a nursery in Surbiton, south west of the capital, when they began trying to solve a jigsaw puzzle with two three-year-olds and two four-year-olds.

The puzzle, which depicted the four seasons, took a lot longer to solve than one would have expected (nearly ten minutes) and it was difficult to tell whether two of the most powerful men in the country were a help or a hindrance to the toddlers Joshua, Stephanie, Hamish and Leo.

At one point, Mr Cameron said, "We've got all day", while Mr Johnson cried defiantly, "We can't be beaten by the puzzle."

In the end, with Mr Cameron wedging pieces in where they should not have been, the teacher stepped in to help the Prime Minister and possible future Tory leader finish the puzzle.

It's not the first time Mr Cameron has struggled in a school this campaign: on a recent visit he made one school girl bury her face into her text book while reading with the Prime Minister.