Terry O'Neill is one of the world's most celebrated and collected photographers. No one has captured the frontline of fame so broadly - and for so long. For more than 50 years, he has photographed rock stars and presidents, royals and movie stars, at work, at play, in private. He pioneered backstage reportage photography with the likes of Frank Sinatra, David Bowie, Sir Elton John and Chuck Berry and his work comprises a vital chronicle of rock and roll history. Now, for the first time, an exhaustive cataloguing of his archive conducted over the last three years has revisited more than 2 million negatives and has unearthed unseen images that escaped the eye over a career spanning 53 years.