| Railway Company – Post 1923 Grouping | |
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GWR – Great Western Railway |
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SR – Southern Railway |
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LMS – London Midland & Scottish |
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LNER – London North Eastern Railway |
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BR – British Railways (Designs post 1948) |
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| Earlier Locomotives – Not taken into Grouping in 1923 | |
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New Build |
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The First Generation of Steam Locomotives |
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GWR Narrow Gauge |
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Broad Gauge |
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National Railway Museum Collection |
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Preserved British Steam Locomotives 