Event Details Line-up & Highlights On Saturday, July 4, 1970, Tyrannosaurus Rex performed at the Blues at the Eyrie open-air festival at Bedford Town Football Ground. This was a pivotal transitional gig for Marc Bolan’s band. They were evolving from their psychedelic folk roots toward the heavier electric sound that would soon spark the glam rock explosion. Main Acts: • Deep Purple (headliners) • Chicken Shack • Tyrannosaurus Rex • Medicine Head, Principal Edwards Magic Thea