- GWR
- Great Western Railway
- LMS
- London Midland & Scottish Railway
- LNER
- London & North Eastern Railway
- SR
- Southern Railway
- NER
- North Eastern Railway
- GNR
- Great Northern Railway
- LNWR
- London & North Western Railway
- LB&SCR
- London Brighton & South Coast Railway
- SE&CR
- South Eastern & Chatham Railway
- B&MR
- Brecon & Merthyr Tydfil Junction Railway
- BR
- British Rail or British Railways
- BRC&W
- Birmingham Railway Carriage & Wagon Company
- SVR
- Severn Valley Railway
- PW
- Permanent Way
- S&T
- Signals & Telegraph
- MPD
- Motive Power Depot
- C&W
- Carriage & Wagon
- DMU
- Diesel Multiple Unit