 Tracks 1, 18, 19, and 26 recorded 10 October 1967, at De Lane Lea Studios, Kingsway, London.Tracks 20, 21, 22, and 23 recorded 13 April 1970, at IBC Studios, London.Tracks 24 and 25 recorded 29 January 1973, at the BBC Television Centre, Wood Lane, London, using previously recorded backing tracks.