An interesting BBC film about the Voluntary Interceptors, made I think in the 1970s, is located at:- http://www.eafa.org.uk/catalogue/5108 '610E
The East Anglian Film Archive is an excellent resource, I suggest that everyone take time to visit it and see whats on offer.
good day geoff501,july05,09:09.am.re:the teenage radio enthusiasts who helped win ww2,there are some amazing story's about the people who decoded enemy messages.they never received recognition for there efforts,its like other branches of the armed services.its all on now.70 years later.most of our heros have passed on,may they rest in peace.thank you for posting,bernard85