Noel Edmonds presents the last in a six-part series tracing the development of pop music broadcasting.
Some of today's top DJs, including Tommy Vance, Kenny Everett, Terry Wogan and Andy Peebles recall the local radio explosion of the 1970s and the development of MOR pop radio. Rosko and Johnnie Walker survey the current state of US radio with a peep into the future of the art.