Slight tangent to the topic, but for those of you interested in the radar equipment and early use in civil ATC, 'Watching The Skies: The History of Ground Radar in the Air Defence of the United Kingdom" by Jack Gough is an interesting (if heavy!) read. The book (obviously) concentrates on Air Defence, but many of the radar sites and control centres were used for civil ATC purposes as well and there is considerable information on them - even my father-in-law spent some time doing civil ATC out of Sopley bunker!
It's not current (pub. 1993) but then it doesn't need to be
RS