He may have taken many photos of some of the world's most high profile celebrities in his lifetime, but ask British photographer Jason Bell which image ranks as his best and he'll tell you that he has yet to shoot it.

An Oxford University graduate who studied politics, economics and philosophy, Bell is renowned for his images of personalities such as Paul McCartney, Johnny Depp, Scarlett Johansson and David Beckham.

He was also the person chosen to photograph Prince George's christening in 2013. "I am proud of that. I can go anywhere in the world and people would say that they know the photo of Prince George. But I don't know if it's my best work.