Other Local Societies & Theatres
- Cassio Operatic Society
- Rickmansworth Players
- St Albans Musical Theatre Company
- Radlett Light Operatic Society
- Putteridge Bury G&S Society
- Julian Light Operatic Society (G & S Group in Ealing)
- Watford Palace Theatre
- The Henderson Hub
Gilbert & Sullivan Resources
Theatrical Resources
- NODA – National Operatic & Dramatic Association
- The Amdram Site
- The Sondheim Society Information about the works of Stephen Sondheim