The British Rail Class 141 was the first production model of the Pacer diesel multiple unit railbus. During the 1980s, British Rail was interested in replacing its first generation diesel multiple units, particularly in the use of railbuses to service its lightly used branch lines. It was decided to develop such a vehicle with a high level of commonality with the widely used Leyland National bus, leading to its modular design serving as the basis for the design. Several single and two-car prototypes were constructed and evaluated, before an order was placed with British Leyland for twenty two-car Class 141 units during 1984. During their operating lives, the type was tasked with various passenger services across the UK for 13 years; a large portion of the withdrawn units were subsequently exported to Iran, where they were operating for a further eight years, giving the Class 141 having a total lifespan of 21 years. These Pacer units would make an interesting dlc for NTP on services between Huddersfield and Leeds being that they were introduced to this part of the route around the time period reflected in game. Class 141 in early West Yorkshire PTE livery as seen when introduced.
The Class 141 was the early rendition of Pacer built using actual bus bodies hence the smaller loading gauge. The Class 142-144 units ended up with wider loading gauge.
Could've sworn I saw a 1984 date whilst doing services. This is why I did not include the Class 142s as they appeared from 1985.