Personnel who performed as guest members
Soprano
- Nicole Tibbels
- Elizabeth Harrison
- Sarah Leonard
- Elaine Pearce
Mezzo
- Meriel Dickinson
- Carol Hall
- Teresa Shaw
- Carol Canning
- Nancy Long
- Doreen Walker
- Lindsey John
- Amanda Dean
- Susan Flannery
Tenor
- Peter Hall
- Alan Belk
- Jeremy Taylor
- William Brooks
Bass
- John Lubbock
- Brian Etheridge
- Gordon Jones
- Lindsey Benson
- Michael Dore
- Geoffrey Shaw
- David Beavan
Sound
- Mike Skeet
- Hugh Macdonald
- Luciano Berio
- Trevor Wishart
- Kaija Saariaho
- Marco Stroppa