I found the above link via Southgate ARC's news site & thought it may interest others here..
simplified description of the defunct MOULD radio system. The original phase provided one system per home defence sub-region and employed 120 hilltop sites. A later contract extended this with the addition of County networks bringing the number of separate networks to ninety and increased the hilltop sites to 150. Based on an article in 'The Wire' circa 1986, by A F Carter with the addition of my own observations.
Steve Scanlon - The Web Site Owner
I became interested in the UK Civil Defence for the Cold War, as a result of working as a engineer for 'Post Office Telephones' later privatised and renamed 'British Telecom'. Between 1978 and 1981 I maintained the early warning equipment and visited ROC posts in part of North Northamptonshire and South Leicestershire. At the time I never disclosed this information even to my closest friends. Now twenty years have passed since the Cold War ended the Internet provides a good medium to disseminate the details of these defunct systems.