Midland Railway Johnson 0-6-0

Although there were many (mostly small) variations between different batches both as delivered and as successively rebuilt, all 935 can be regarded as a single series, one of the largest classes of engine on Britain's railways.

While these were being built there started a program of rebuilding many of the earlier engines (but not the first 2 classes) with the "H" boiler to increase their power.

The smaller driving wheels gave an enhanced tractive effort at the expense of reduced speed, which was useful on coal (and other mineral) trains.

Sixteen engines of the "M" class were bought by the Midland and Great Northern Joint Railway, eight in 1896 and eight in 1899, which were numbered 58–73.

62 and 69) were rebuilt in 1906 and 1909 with the larger Class "H" boiler (4 ft 9+1⁄8 in (1,451 mm) diameter over the largest ring, round-top).

[12] All 16 were acquired by the London and North Eastern Railway (LNER) on 1 October 1936 and new numbers 058–073 were allocated, but five (nos.

[13] Withdrawal of these 11 began in 1938, and by the time that the LNER renumbering scheme was prepared in June 1943, there were five left, nos.

[15] Ten engines of "M" class were bought by the Somerset and Dorset Joint Railway in 1896 and 1902, numbered 62–66 and 72–76.

[20] Tri-ang Railways began producing a basic OO gauge model of the 2736 class, specifically No.

[21] Bachmann Industries released several models of the M Class in LMS and BR liveries starting in 2010.