page_title: LB&SCR D1 class
section_title: Pre-grouping
hierarchical_section_title: LB&SCR D1 class / Pre-grouping
caption_attribution_description: English: Class D1 with modified tanks
context_page_description: The LB&SCR D1 class were powerful 0-4-2 suburban passenger tank locomotives, designed by William Stroudley of the London Brighton and South Coast Railway in 1873. They were originally known as "D-tanks" but later reclassified as class D1. Members of this very successful class survived in service until 1951.
context_section_description: For twenty years the class were the mainstay of the LB&SCR outer suburban services, until gradually replaced by R.J. Billinton's D3 class 0-4-4 tank engines in the mid-1890s. Thereafter they were used on a variety of secondary passenger, and occasionally freight services throughout the railway. The first locomotive was withdrawn in December 1903, but many of the locomotives were still in good condition and popular with the engine crews. Douglas Earle Marsh therefore sought to rebuild six examples in 1910 with a larger boiler and cylinders. In the event, only one locomotive, number 79A, was rebuilt. This locomotive was known as D1X class, but although it was more powerful than the originals, it was found to be unsteady at speed and so no further rebuilds were authorised. Of the other five new boilers, one was used to rebuild E1 class no. 89 in 1911, and the other four were put to stationary use at various places on the LBSCR system.
caption: Class D1 with modified tanks
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