Eagle vision s sd blu ray range presents upscaled standard definition original material with uncompressed stereo and dts hd master audio surround sound for the best possible quality on the 30th june 1990 in the grounds of knebworth house a concert was staged to raise funds for nordoff robbins music therapy and the brit school for performing arts it has since been heralded as the best british rock concert of all time the breathtaking performing line up was drawn entirely from acts who had bee