![BUT diesel railcars - trains - power units : brochure : British United Traction Ltd. : London : nd [c.1955] : cover](https://live.staticflickr.com/65535/54399554180_71e8c64101_m.jpg)
British United Traction, with its BUT badge, was formed in 1946 as a joint company between Associated Equipment Company - the AEC - and Leyland Motors Ltd. to pool marketing and manufacturing of trolleybuses and railway equipment. This included the associate companies of the two, Albion, Crossley and Maudsley. This folder, along with a series of loosely bound infomation sheets contains an introduction, railcar specifications, performance, power units, body design and a questionnaire that with 64 questions allowed the completed form to be sent to BUT for a quotation. This feature is intact in this copy!
Although BUT note they can produce complete railcars or railcar chassis they were best known, in terms of railway rolling stock, for the diesel engines they produced in large quantities especially for the vast number of diesel multiple units being constructed by British Railways after 1954 as part of the nationalised concern's Modernisation Programme. The folders include a picture of one of the "Derby Lightweight" units that were fitted with a mix of BUT (Leyland) and BUT (AEC) engines. Both Leyland and AEC had pre-war experience of engines for diesel railcars; most notably AEC with their railcars for the Great Western Railway/Western Region. BUT also show examples of their products in trains for the then three Irish mainline railways, CIÉ, the GNR(I) and the UTA as well as units built by the Netherlands Railways, NS.
The cover shows one of the Irish gauge DMU sets equipped with BUT/AEC equipment for the Great Northern Railway of Ireland. The GNR (I), who turned to multiple unit operation to save operating coasts, was nevertheless in serious financial difficulties by 1953 was nationalised as the GNR Board by both Governments, North and South. It was split between the UTA and CIÉ in 1958. The Performance paper in the folder gives much evidence as to the success of the DMU fleet used on the Dublin - Belfast "Enterprise" service that had been "running for two and a half years".