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Adjacent Line Societies
Caledonian Railway Association
Glasgow & South Western Railway Associaton
Lancashire & Yorkshire Railway Society
London & North Western Railway Society
Midland Railway Society
North British Railway Study Group
North Eastern Railway Association

Cumbrian Heritage Railways and Preservation Groups
Eden Valley Railway
Furness Railway Trust
Lakeside & Haverthwaite Railway
Ravenglass & Eskdale Railway
Ravenglass & Eskdale Railway Preservation Society
South Tynedale Railway
Stainmore Railway Company
Workington Transport Heritage

Other Cumbrian Historical Societies and Organisations:
Cumberland & Westmorland Antiquarian & Archaeology Society
Cumbria Industrial History Society
Cumbria Local History Federation
Cumbria Family History Society
Friends of Cumbria Archives
Engine Lonning
Bombing Decoys Of Cumberland and Barrow
The Settle and Carlisle Railway Trust

Cumbrian Record Offices, Museums and Libraries:
The Beacon, Whitehaven
Cumbria County Record Offices
Kendal RO & for C.R.A. archive collection
Dock Museum, Barrow
Haig Pit Mining and Colliery Museum
Threlkeld Quarry & Mining Museum
Tullie House, Carlisle

Cumbrian-based Railway and Modelling Societies:
Carlisle & District 'O' Gauge Group
Derwent Railway Society (West Cumbria)
Furness Model Railway Club
Kendal Model Railway Club
Railway Correspondence & Travel Society (Furness Lakes & Lune branch)
Stephenson Locomotive Society (South Lakeland branch)

Other parts of the current Cumbrian rail scene:
Keswick to Penrith Railway Re-opening
Northern Viaduct Trust
Carlisle Waverley Viaduct Trust
Carnforth Station Visitor Centre
Cumbria Railways
Industrial History of Cumbria
Windermere Lake Steamers - a history
Direct Rail Services
XYZ Rail ( formerly Stobart Rail )
Story Contracting
Transpennine Express
Virgin West Coast
Avanti West Coast
West Coast Railways

Other rail and industry-related websites:
National Railway Museum
Realtime Trains
Grace's Guide - source of historical information on industry and manufacturing in Britain
Signalling Record Society
The Engineer - bound volumes
Network Rail
Railway Codes and other data
Finally...further information sources.....:
The Railway Work Life and Death Project
Don Ashton’s Steam Locomotive Valve Gears