Michael Buerk narrates a documentary which looks back at 40 years of local radio in Britain. Launched on a shoestring budget, it was a new kind of broadcasting, but inside and outside the BBC there were powerful enemies who wanted it to fail. To some, local radio was a joke, but for others it was a vital link with listeners. Kate Adie and Desmond Lynam, who got their first break at the launch of the new stations, are among those who recall the chaos and excitement of the early days.