From an Apollo Magazine online article:

He shot the Beatles in a St John’s Wood back garden before they had even broken the Top 10 (‘I didn’t know how to work with a group, but because I was a musician myself and the youngest on staff by a decade, I was always the one they’d ask’), and within a few months was kitting out the Rolling Stones with suitcases to look like a travelling band in a series of candid street shots.
His portraits, in grainy 35mm black-and-white, are a veritable roll call of the 1960s youthquake – Michael Caine, Terence Stamp, David Hemmings, Marianne Faithfull, Jean Shrimpton (walking barefoot on a rain-slicked King’s Road, or posing with the porcelain inmates of a dolls’ hospital) – and of the other stars of the age, from the Rat Pack to Muhammad Ali. He photographed Churchill being carried from hospital in an armchair, a potentate on a palanquin; shot Peter Cook and Dudley Moore floating on lilos in raincoats; and extensively documented the early career of Elton John – including a remarkable shot where he plays an upright piano with his legs floating up towards the ceiling, as if performing on the International Space Station.