David Cameron has revealed in an interview that President Obama sometimes calls him "Bro", short for 'brother', indicating the closeness of their relationship.

The urban dictionary defines a bro as a young white American who identifies with hip hop culture.

Nihal Arthanayake, a presenter on BBC Asian Network, told Today: "It all depends on the context to why you're referring to someone as bro."

"Somebody, I think, who is very close to you, you would probably call brother instead of bro."

Peter Yorke, a social commentator, said: "I would only say bro with a very heavy sense of irony. It would be a completely ridiculous form of address for a white middle-class person like me."

John Humphrys revealed "My youngest son calls me blud"

First broadcast Today programme 5 January 2015.