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LNER Gresley Open Third (TO) No 43600 was built at York in 1934, primarily for excursion traffic, but carriages of this type were often found in service trains. It was the first LNER vehicle built with a welded chassis, reducing the weight by around a ton<ref> vintagecarriagestrust.org</ref>. From about 1960 until 1979 it served as part of an Emergency Control Train, for which role the interior was stripped of seats, heating and 24V lighting. Desks, phones, 240V mains lighting and heating, lockers and chemical toilets were added. ===43600 in Preservation===43600 arrived on the SVR in 1980, when it in black livery. It was painted brown given a set of plastic chairs borrowed from the Catering Dept. and was used in service trains from that September until late 1984. Restoration into 1935 livery but with a very basic "temporary" interior, (fortunately including proper seats, heat, light and working toilets) was completed in 1987, after which it was used for 27 years! ===Overhaul and Upgrade===In 2014 it received an overhaul and comprehensive upgrade in LNER period style to the interior, re-entering service in November. LNER pattern luggage racks, coat hooks, wall lamps, tables and mirrors were added, whilst the angular Mk1 seat ends were replaced with new ones to a much more sympathetic design. Fawn vinyl, similar to the original Rexine was used to cover the walls, and the seats were upholstered with cut moquette made to an LNER pattern of the period. The upgrade was paid for by its new owners, the SVR Charitable Trust thanks to many generous sponsors who contributed £13.8k including Gift Aid.