the band's onstage line-up varied, sometimes on a weekly basis, and they also invited a number of guest musicians into the recording studio. additional members of various duration include: vernon dudley bohay-nowell, martin "sam spoons" ash, leon "lenny" williams, john parry, raymond lewitt, sydney "big sid" nicholls, bob kerr, dave clague, joel druckman, "borneo" fred munt, chalky chalkey, dennis cowan, aynsley dunbar, jim capaldi, anthony 'bubs' white, andy roberts, dave richards, dick parry, hughie flint, tony kaye, and glen colson. keith moon, who became great friends with both stanshall and smith, played drums for part of the bonzo's set at the 1969 plumpton festival (the who were headlining that night).