1953 British Pathe newsreel on Fleet Street, featuring (among others) Arthur 'Tony' Helliwell, Peter Wilson and Hannen Swaffer.
Gentlemen Ranters - remniscences of old Fleet Street.
'Getting the Lambs to Gambol' - Hugh Cudlipp's witty, double-edged tribute to Frank Charman.
Anti-Aircraft Home Page - Interesting material on radar, vehicles and gun sites. Includes a link to a map of HAA gun sites.
Historic Military Vehicle Forum - Radar Trailers - includes pictures of an AA No 1 Mk 2 site and some surviving (sort-of) radar trailers.
Anti-Aircraft Fire Control and the Development of Integrated Svstems at Sperry, 1925-1940 - a paper by Terry A Mindell describing the development and operation of the Sperry AA Predictor.
British Mechanical Gunnery Computers of World War II (Allan G Bromley) - a 1984 Australian paper including a chapter on army AA predictors.
The Secret Scotland web site has a page on GL Radar, including basic descriptions and some operator remniscences.
British Pathe video of a practice shoot, including a brief shot of the predictor crew at work. The loaders' work rate is impressive!
Brighstone Gun Site - a 2007 survey by the Isle of Wight County Archaeology and Historic Environment Service.