David Cameron is no doubt wishing all his TV interviews were as fun and light-hearted, as his appearance on one of America's favourite chat shows, the Late Show with David Letterman - where instead of a political grilling, the PM faced a pub style quiz over British culture.

On evidence of Cameron's answers, it seems an expensive education at Eton and Oxford doesn't always help. So don't give up the day job, hey Dave.

Written and presented by Ann Salter.