The story
From the early 20th century until 1948, the three main railway companies in Northern Ireland were the Great Northern Railway Ireland (GNRI), which had around one half of its network north of the border; the Northern Counties Committee (NCC), owned by the Midland Railway of England and later the London, Midland and Scottish Railway (LMS); and the small Belfast and County Down Railway (BCDR). The Transport Act (Northern Ireland) 1948 created the Ulster Transport Authority (UTA), which took over the BCDR later that year, followed by the NCC in 1949 as a result of the Ireland Act 1949. In 1958, the GNRI was dissolved and its lines north of the border were also taken over by the UTA. Under the UTA's management, the railway network of Northern Ireland shrank from 900 miles (1,450 km) to 225 miles (362 km). The UTA was split into rail and road operations in 1967, and the rail operations were taken over by the present company Northern Ireland Railways (NIR).
Suffering frequent disruption and damage to infrastructure caused by the Troubles and starved of investment by successive political administrations, the NIR network had become badly run down by the 1960s, with old rolling stock and poorly maintained track. NIR's last steam locomotives were withdrawn in 1970.
In 1970, NIR re-launched the once-popular Enterprise between Dublin and Belfast with three new NIR Class 101 diesel locomotives built by Hunslet in England and Mark 2B carriages built by British Rail Engineering Limited (BREL). Despite frequent interruptions due to bomb scares, the service has remained a more or less constant feature of the NIR network.
As older trains became obsolete in the 1970s, the Class 80 slam-door diesel-electric multiple unit was introduced. BREL built these units between 1974 and 1977 to British Rail's Mark 2 design with some trailer cars rebuilt from hauled stock. The power cars were powered by an English Electric 4SRKT engine, nicknamed 'Thumpers' due to their characteristic sound, and had two English Electric 538 traction motors. These entered service on the suburban lines around Belfast, becoming a stalwart on the whole network. They remained in service until 2012, latterly primarily on the Larne-Belfast line and the Coleraine-Portrush Line. In the early 1980s, NIR purchased one of the prototype LEV Railbuses built to test the railbus concept. This was intended for the Coleraine-Portrush branch, but was withdrawn due to the capacity constraints of a single car. A plan was mooted to use it on the Lisburn-Antrim line to prevent it from being closed. This proposal failed, again because of the limited capacity.
NIR has three EMD class 111 locomotives, 111–113, for freight and passenger use, built in October 1980 (111–112) and December 1984 (113). During the eighties it was apparent that additional trains would be needed. BREL built nine 450 Class sets on former Mark 1 underframes between 1985 and 1987. The power cars had an English Electric 4SRKT engine recovered from former 70 Class units (except 459, which used the engine recovered from 80 Class power car 88) and had two English Electric 538 traction motors. The sets were three-car diesel-electric multiple units, based on a more modern British design, with air-operated sliding doors. They were withdrawn from service in 2012 and replaced by new 4000 Class diesel multiple units. In 1994, NIR bought two EMD 208 Class locomotives identical to Iarnród Éireann's 201 Class. These haul the cross-border Enterprise dedicated trains of modern carriages.
Since 2002, NIR has modernised its rolling stock, with a full fleet replacement of new trains built by the Spanish company CAF. 23 Class 3000 diesel multiple units made up the first batch of trains ordered at a cost of £80 million. They offered greater capacity, performance and accessibility than their predecessors when they were delivered in 2004 and 2005. The next order was for 20 Class 4000s, built 2010–2012. These offered similar benefits to the Class 3000s and completed the fleet replacement. Additionally, NIR has purchased 23 new carriages, via an option in the existing Class 4000 train procurement contract, these are to be used to extend Seven trains from three cars to six cars, which will add much more capacity and will also allow only one guard to be needed on a six-car train, which required two before.
In 2021, Translink announced it would change all of its iconic logos (used for the previous 25 years in the Translink brand and sub brands such as NI Railways, Ulsterbus & Metro) to a new design. The design was intended to focus to "modernise and simplify the brand presence". The creation of the logo cost £15,000 and was created by Belfast-based company McCadden Design in partnership with Translink.
From Wikipedia’s article on NI Railways, shared under CC BY-SA 4.0.4