Anon Lead Guitarist Published February 11, 2013 at 2967 × 2259 in The History of Live Music in Britain, Volume 2: 1968-1984: From Hyde Park to the Hacienda – Simon Frith, Matt Brennan, Martin Cloonan and Emma Webster (forthcoming) 31st May 1975: The lead guitarist of a group playing at the free pop concert held in Hyde Park, London, 1975. (Photo by Keystone/Getty Images) 31st May 1975: The lead guitarist of a group playing at the free pop concert held in Hyde Park, London, 1975. (Photo by Keystone/Getty Images)