Preservation groups

Cumbrian Railways Association
Caledonian Railway Association
Glasgow & South Western Railway Association
Highland Railway Society
North British Railway Study Group
Lancashire & Yorkshire Railway Association
Great Eastern Railway Society
Gresley Society
Historical Model Railway Society (HMRS)
Contains many further references to sources of information.
Industrial Railway Society
Well conceived site: in bibliographical terms this is a paradigm for what a properly organized historical organization should do as all its out-of-print journal material is available online together with sufficient details to order in-print material.
Irish Railway Preservation Society
Kidderminster Railway Museum
LMS Society
The Locomotive Club of Great Britain is self-evident in its aims
London & North Western Railway Society
London & South Western Railway
Midland Railway Association
Midland Railway Centre website
Norfolk Railway Society
North Eastern Railway Association
Contains a considerable amount of bibliographical information, which may be accessed in EXCEL or HTML.
Railway & Canal Historical Society: DOES NOT RECIPROCATE LINK
Railway Correspondence & Travel Society (RCTS) is one of the main enthusiast bodies in Great Britain
Signalling Record Society Stephenson Locomotive Society is the oldest (established 1909) enthusiast society
Vintage Carriages Trust & Museum
Warwickshire railways

Societies
A1 Steam Locomotive Society
Clan Line preservation group