Power classification

A number of different numbering and classification schemes were used for the locomotives owned by the London, Midland and Scottish Railway (LMS) and its constituent companies; this page explains the principal systems that were used.

The following abbreviations for the constituent companies are used on this page:

Caledonian Railway (CR), Furness Railway (FR), Glasgow and South Western Railway (GSWR), Highland Railway (HR), Lancashire and Yorkshire Railway (LYR), London and North Western Railway (LNWR), Maryport and Carlisle Railway (MCR), Midland Railway (MR), North London Railway (NLR) and North Staffordshire Railway (NSR)

Cleator and Workington Junction Railway (C&WJR), Glasgow and Paisley Joint Railway (G&PJR), Knott End Railway (KER), Stratford-Upon-Avon & Midland Junction Railway (S&MJR), and Wirral Railway (WR)

Somerset and Dorset Joint Railway (S&DJR) - absorbed October 1936

For information about individual classes and locomotives, see: Locomotives of the London, Midland and Scottish Railway

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