[2] All were built in 1879 and were intended for light suburban passenger traffic around London and the South Coast on the LSWR network.

The 46 class were later rostered on local passenger services under the ownership of the Southern Railway in 1923, though all were withdrawn and scrapped by 1925.

As a result, Adams intended them to be an immediate stop-gap measure that could be utilised on suburban passenger services while he devised a better solution to the railway's motive power problem.

[1] However, the conversion resulted in a heavier locomotive, as the water capacity was increased and coal bunker enlarged to enable longer journeys between refueling.

[1] LSWR numbering policy was very unusual because the railway did not allocate a numerical series to a new class of locomotive.

[1] One locomotive, number (0)376, was withdrawn early in February 1914, though was sold to the Brecon and Merthyr Railway in South Wales.

[1] As a result, four of the class were withdrawn in November 1921, with the remaining seven making it to grouping and Southern Railway ownership in 1923.