Here are some links to other rail-related web sites that we've found useful.
- Signalling Record Society
- Exeter West Group
- H M R S (Historical Model Railway Society)
- National Model Railroad Association (modelling US railroads)
- West Country Railway Archive
and if you're interested in the history of American railroads, you may find this one of interest:
"Moving West: The History of the Transcontinental Railroad" http://www.upack.com/moving-west-the-history-of-the-transcontinental-railroad/