Richard Deas of www.bnnrs.net/ (Bassetlaw (North Notts) Railway Society).
Most Signalbox diagrams kindly provided by the 'Industrialogical Associates Collection' permission granted by Andy Rush. (Link below takes you to John Saxton's site and Andy Rush's diagrams)
The Great Central Society:
Signalling Record Society:
Gainsborough Model Railway Society:
Special thanks to the following individuals for contributing pictures and information:
Chris Booth, Signaller and work collleague (within NR), Worksop PSB. See his own fantastic collection, collected over many years by clicking on this LINK.
M. A. King & B. Gellatly from the Great Central Railway Society
Mick Charlesworth, Network Rail Mobile Op's Manager, Sheffield.
Michael Kaye, Driver for East Coast Railway Co.
Derek Wilson; See his own collection by clicking HERE.
John Law; see his fantastic huge collection by clicking HERE.