Founded in 1954 to bring together all those interested in the history of transport, with particular reference to railways and waterways in Britain, its main objects are to promote historical research and to raise the standard of published history. Publications, interest groups and lots of links.
http://www.rchs.org.uk/trial/gwpf.php?wpage=Home
The website of the National Railway Museum in York, England has a step-by-step guide to researching your railway ancestors. Under Railway Stories is information on the 20,000 railway workers who died in World War One.
http://www.nrm.org.uk/ResearchAndArchive.aspx
An online archive of articles, plans and drawings from Network Rail. There is material relating to railway companies, stations, bridges and viaducts and more.
http://www.networkrail.co.uk/VirtualArchive
The Institute of Railways Studies at the University of York has useful background information on railways in Britain. Particularly useful are the historical excerpts from the railway press.
http://www.york.ac.uk/inst/irs/irshome/features/features.htm