Photographer Chris Dreja: “Peter Grant [Led Zeppelin’s manager] had an office on the New King’s Road next to a bike shop, so we decided to do the shoot on bikes. We had new Harley Davidsons brought round for us. Jimmy and I couldn’t ride a bike to save our lives – the only one who could was Keith [Relf]. Peter’s dressed as Father Christmas; that’s so typical of him.&quot; (Photo: ©Chris Dreja/Proud Galleries)