Website links...
Here are some links that may be of interest...

Industry Associations
The Broadcast, Entertainement & Cinematographer's Trade Union
Production Services Association
Association of Lighting Designers
Professional Lighting And Sound Association (PLASA)
Association of British Theatre Technicians (ABTT)

Entertainment Industry Insurance Brokers...
Doodson Broking Group
Torribles
Allan Chapman James

Clients & Productions...
Complicite
Concept Completion LLP