Sam Brown, Durga McBroom e Carol Kenyon - voce in Keep Talking
Lee Ritenour - chitarra acustica in Comfortably Numb
Islington Green School - coro in Another Brick in the Wall (Part 2)
Pontardulais Male Voice Choir diretto da Noel Davis - coro in When the Tigers Broke Free
The Salvation Army: Ray Bowes (cornetta), Terry Camsey (cornetta), Mac Carter (trombone), Les Condon (tuba Mib), Maurice Cooper (eufonio), Ian Hankey (trombone), George Whittingham (tuba Sib), e altri in Jugband Blues