The Festival included: Led Zeppelin, Pink Floyd, Canned Heat, Frank Zappa and the Mothers of Invention, The Byrds, Jefferson Airplane, Dr John, Steppenwolf, Santana, Johnny Winter, Country Joe, It's a Beautiful Day, Flock, Hot Tuna, and Maynard Ferguson's Big Band, John Mayall's Blues Breakers (featuring Pete Green), and Fairport. The Moody Blues were rained off but The Byrds made their UK reputation by going on instead, playing an acoustic set to ecstatic applause.

This was the UK version of Woodstock; a total of 500,000 people participated in three days of music. Guests included The Doors; Jimi Hendrix; Jethro Tull; Emerson, Lake & Palmer; The Who, Ten Years After, Moody Blues, Taste, Kris Kristofferson, Joan Baez, John Sebastian, Leonard Cohen, Joni Mitchell, Miles Davis.

At the beginning of this concert, Ray took a misstep and fell off the stage, breaking his flute. He injured a foot and one arm but insisted on playing. Someone in the audience provided a flute (!) and he was able to finish the show.

Concerts were cancelled because after the US Tour, Mike Pinder stayed in the US for surgery on his vocal chords.