The British Rail Class 114 diesel multiple units were built by BR Derby from September 1956 to July 1957. Forty-nine 2-car units were built, numbered E50001-49 for driving motors (later renumbered 53001-49) and E56001-49 for driving trailers (later renumbered 54001-49). The units were used in the early days out of 40A Lincoln TMD (LN) on services all over the county, although a small number were transferred to 41A Sheffield (Darnall) during 1959/60. The vehicles were the first type to be built at Derby with the longer 63 ft 6 in underframe, and the first Derby vehicles to be built from steel. This design would be re-used in the 116 and 117. The type was classed a heavyweight unit; with their original 150 hp BUT engines, they were found to be underpowered for the local scheduled services, and lost time especially when towing a van (which was a regular occurrence in that area). The most problematic stretch was the 1 in 122 for just under a mile near Ancaster which reduced these units to 45 mph even on full power. As a result of this, several 3-car formations were put together using two power cars and one trailer. The type was re-engined with Leyland Albion 230 bhp motors. These were used in the main on Grantham - Boston/Skegness and Lincoln - Cleethorpes workings during 1957, and would be a familiar sight in the Lincolnshire area until the early 1990s. Formations Formations noted in Railway Observer magazine were E50008/E50007/E56007, E50011/E50012/E56012, E50038/E50039/E56015 and E50015/E50035/E56035. Spare trailers were stored at various locations - E56016/25/40 at Blankney & Metheringham, E56010/39 at Bardney and E56004/20/22/37/38/44/45 near Sleaford South Junction. E50029/30/31/32/33/34 and their respective trailers were transferred to Stratford between February and April 1957 in exchange for Derby 2-car lightweight units, but between June and October the 114s moved back to Lincoln. History E50049/E56049 was introduced with 230 hp versions of the power unit, which proved to have a much more acceptable power to weight ratio, and during 1959 and 1960 all the class were fitted with these more powerful engines and settled down to work most Lincolnshire local services (with regular visits to South Yorkshire and Nottinghamshire) for over 25 years. One of the class (one of the cars 50040) along with another 3-car unit was on one of the last passenger service from Louth to Grimsby on 20 December 1980. Other services where Cleethorpes to