 | Brighton Circle | https://www.lbscr.org |
 | Caledonian Railway Assocation | https://www.crassoc.org.uk |
 | Colne Valley Railway Museum | https://www.colnevalleyrailway.co.uk |
 | Cumbrian Railways Association | https://cumbrianrailways.org.uk |
 | Glasgow & South Western Railway Association | http://www.gswra.org |
 | Great Central Railway Society | http://www.gcrsociety.co.uk |
 | Great Eastern Railway Society | https://gersociety.org.uk |
 | Great Northern Railway Society | https://www.gnrsociety.com |
 | Great North of Scotland Railway Association | http://www.gnsra.org.uk |
 | Great Western Study Group | https://www.gwsg.org.uk |
 | Highland Railway Society | http://www.hrsoc.org.uk |
 | Historical Model Railway Society | https://hmrs.org.uk |
 | Lancashire & Yorkshire Railway Society | https://lyrs.org.uk |
 | London & North Western Railway Society | https://lnwrs.org.uk |
 | LMS Society | https://www.lmssociety.org.uk |
 | Midland Railway Society | http://www.midlandrailway.org.uk |
 | Midland & Great Northern Circle | http://www.mgncircle.org.uk |
 | National Railway Museum | https://www.railwaymuseum.org.uk |
 | North British Railway Study Group | https://www.nbrstudygroup.co.uk |
 | North Eastern Railway Association | https://ner.org.uk |
 | North London Railway Historical Society | http://www.nlrhs.org.uk |
 | North Staffordshire Railway Study Group | https://www.nsrsg.org.uk |
 | Railway and Canal Historical Society | https://www.rchs.org.uk |
 | Railway Correspondence and Travel Society | https://rcts.org.uk |
 | Signalling Record Society | https://www.s-r-s.org.uk |
 | South Eastern & Chatham Railway Society | http://www.southeasternandchathamrailway.org.uk |
 | South Western Circle | https://www.lswr.org |
 | Southern Electric Group | https://www.southernelectric.org.uk |
 | Swiss Railways Society | https://swissrailsoc.org.uk |
 | The National Archives | https://www.nationalarchives.gov.uk |
 | Welsh Railways Research Circle | https://www.wrrc.org.uk |
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