Boris Johnson: Cameron 'only pretended' not to know answers to Letterman's questions

London Mayor Boris Johnson has said that Prime Minister David Cameron was "only pretending" when he failed to correctly answer a question on the Magna Carta during an interview on the Late Show with David Letterman this week.

Speaking to LBC 97.3 Radio's Nick Ferrari, the Mayor, who has appeared on the programme himself, said:

I think he (Prime Minister David Cameron) was only pretending, I think he knew full well about the Magna Carta. It was a brilliant move in order to show his demotic credentials and to show he didn't have Latin bursting out of every orifice.