The London, Midland and Scottish Railway had the largest stock of steam locomotives of any of the 'Big Four' Grouping, i.e. pre-Nationalisation railway companies in the UK. Despite early troubles arising from factions within the new company, the LMS went on to build some very successful designs; many lasted until the end of steam traction on British Railways in 1968. For an explanation of numbering and classification, see British Rail locomotive and multiple unit numbering and classification.
The Highland Railway E Class was a class of 4-4-0 steam locomotive designed by David Jones for passenger service. They were also known as the 'Clyde Bogies' as they were built by the Clyde Locomotive Company in Glasgow, Scotland. They were the first locomotives built by that company.
The Midland Railway 1377 Class was a class of 185 0-6-0T tank locomotives. They were introduced in 1878 by Samuel W. Johnson, and were almost identical to the 1102 class of 1874; the latter having fully enclosed cabs, while the 1377 class were built without a rear to the cab and only a short cab roof, hence their nickname "half-cabs". They were given the power classification 1F.
The London and North Western Railway (LNWR) George the Fifth Class was a class of 4-4-0 passenger steam locomotive.
The London and North Western Railway (LNWR) Prince of Wales Tank Class was a pacific tank engine version of the Prince of Wales Class 4-6-0 steam locomotive.
The London and North Western Railway (LNWR) Experiment Class was a class of 4-6-0 steam locomotive designed by George Whale.
The London and North Western Railway (LNWR) Alfred the Great class, after modification known as the Benbow Class was a class of 4-4-0 4-cylinder compound locomotives by F.W. Webb. A total of forty were built from 1901–1903. They were a development of the Jubilee Class, with a slightly larger boiler.
The Lancashire and Yorkshire Railway (L&YR) Class 7 was a class of Atlantic passenger steam locomotives to the design of John Aspinall. Forty were built between 1899 and 1902. They were known as "High-Flyers" as a result of having a high-pitched boiler that was supposed to increase stability at speed. All passed into London, Midland and Scottish Railway (LMS) ownership on the grouping of 1923, becoming the LMS's only atlantic tender engine class. The LMS gave them the power classification 2P. Withdrawals started in 1926, and the last was withdrawn in 1934. None was preserved.
The Midland Railway 1252 class was a class of 30 0-4-4T locomotives built by Neilson and Company in 1875–1876 to the design of Samuel W. Johnson. They were a development of the 6 Class. Originally numbers 1262–1281 and 1252–1261. Under the Midland Railway's 1907 renumbering scheme they became 1236–1265.
The London and North Western Railway (LNWR) Class C1 was a class of 0-8-0 steam locomotives. 34 were rebuilt by Charles Bowen Cooke from Class A 3-cylinder compounds between 1909 and 1912.
The L&YR Class 6 was a class of 2-4-2T steam locomotives of the Lancashire and Yorkshire Railway. It was a superheated development by George Hughes of the Aspinall L&YR Class 5. Some were rebuilt as conversions and others built new. 20 new locomotives were built in 1911. Of the conversions, 26 were of the Aspinall engines, 18 of Hughes' own version with Belpaire firebox.
The locomotives of the Highland Railway were used by the Highland Railway to operate its lines in the north of Scotland. The Highland Railway locomotive works was at Lochgorm, Inverness. The works had been built about 1855 by the Inverness and Nairn Railway. The locomotive classes are listed under the names of the railway's Locomotive Superintendents.
The L&YR Class 31 was a class of 0-8-0 steam locomotives of the Lancashire and Yorkshire Railway. The class was designed by George Hughes and introduced in 1912. The class comprised 115 new locomotives and 40 rebuilt from other classes.
The L&YR Class 30 (Hughes) was a class of 0-8-0 steam locomotives of the Lancashire and Yorkshire Railway. The class was designed by George Hughes and introduced in 1910. Twenty-nine were rebuilds from Aspinall's L&YR Class 30 and 40 were new locomotives.
The L&YR Class 2 (Aspinall) was a class of 4-4-0 steam locomotives of the Lancashire and Yorkshire Railway. It was a development of the Barton Wright Class 2 with larger cylinders and Joy valve gear and was introduced in 1888. Thirty locomotives were built and 29 passed to the London, Midland and Scottish Railway at the grouping in 1923.
The L&YR Class 3 was a class of 4-4-0 steam locomotives of the Lancashire and Yorkshire Railway. It was introduced in 1891. Forty locomotives were built and 34 passed to the London, Midland and Scottish Railway at the grouping in 1923.
The L&YR Class 4 was a class of 4-4-0 steam locomotives of the Lancashire and Yorkshire Railway. The class comprised six rebuilds, with superheater, of L&YR Class 3 locomotives. All six passed to the London, Midland and Scottish Railway at the grouping in 1923.
The Midland Railway 1532 class was a class of 65 0-4-4T locomotives built by Derby Works between 1881 and 1886 to the design of Samuel W. Johnson. They were a development of the 1252 class. Originally numbered 1532–1551, 1632–1656, and 1718–1737; under the 1907 renumbering scheme they became 1266–1330, and were given the power classification 1P.
The LNWR 18-inch Goods was a class of 310 0-6-0 freight steam locomotives built by the London and North Western Railway at their Crewe Works between 1880 and 1902.
The LNWR 5ft 6in Tank was a class of 160 passenger 2-4-2T locomotives manufactured by the London and North Western Railway in their Crewe Works between 1890 and 1897. The "5ft 6in" in the title referred to the diameter of the driving wheels – although the stated dimension was for the wheel centres – the nominal diameter including the tyres was 5 ft 8 1⁄2 in (1,740 mm).
