The concert was held to coincide with the release of Pink Floyd 's second album , A Saucerful of Secrets .
On Saturday 29 June 1968 , Pink Floyd was the first band to play , alongside the T - Rex , Jethro Tull , and Roy Harper .
The concert was held to coincide with the release of band   's second album , A Saucerful of Secrets .
On Saturday 29 June 1968 , Pink Floyd was the first band to play , alongside the T - Rex , Jethro Tull , and Roy Harper .