BR Standard 2MT 2

The 1948 Locomotive Exchanges had given British Railways a clear view of the strengths and weaknesses of the locomotive types it had inherited. The Standards programme that followed, led by R. A. Riddles as Member of the Railway Executive responsible for mechanical engineering, set out to produce a coherent fleet of twelve standard locomotive classes covering the full range of BR's traction requirements. The Class 2 specification, light mixed-traffic with low axle load for branch and secondary work, occupied the bottom of the tender-engine range.

For the Class 2, the Standards team faced an unusually clear design choice. The LMS Ivatt Class 2 2-6-0 of 1946 was already doing exactly the job the BR Standard would be required to do, and was doing it well; 128 examples were ultimately built between 1946 and 1953 across three works. Rather than design a new locomotive, the Standards team, working at Derby, took the Ivatt design as the starting point and adapted it for the BR Standard fleet.

The modifications were modest but pointed. The cab was reduced in size to fit a universal loading gauge, the BR Standards' promise of 'go anywhere' route availability required tighter external dimensions than some pre-grouping cabs allowed. The Ivatt-style dome was deleted, giving a cleaner boiler top with the regulator inside the smokebox. The side plates that joined the smokebox saddle to the footplate on the Ivatt were removed, exposing more of the cylinders and frames. A taller chimney was fitted to suit the universal loading-gauge profile. BR Standard fittings replaced the LMS pattern throughout, cab controls, lubricators, sandboxes, lamp brackets. The BR3 3,000-gallon tender with its tender cab was substituted for the LMS pattern.

Mechanically, almost everything was carried over: 5 ft driving wheels, 16½ in × 24 in outside cylinders (matching the post-1951 Ivatt batches with the slightly enlarged bore), 200 psi boiler, Walschaerts valve gear with piston valves, and a 13 ton 15 cwt maximum axle load. The result was a locomotive almost indistinguishable from the Ivatt parent in service, with an uncannily similar power and route-availability profile.

Construction of the 65 BR Standard 78xxx engines took place entirely at Darlington Works between December 1952 and 1956, overlapping for several years with continued construction of the Ivatt 46400-series. The drawing office at Darlington therefore had two near-identical Class 2 designs in production simultaneously for several years, a quirk of the Standards programme that has always seemed faintly absurd in retrospect, given that the additional standardisation gain was modest. A tank engine version, the 84xxx 2-6-2T (also a derivative of the Ivatt design, but with the corresponding 2-6-2T parent), was built at Crewe and Darlington between 1953 and 1957 to a total of 30 examples.

The 78xxx class entered service from December 1952 onwards and spread quickly across all the BR regions. Initial allocations favoured the North Eastern Region, Darlington, West Auckland, Kirkby Stephen, followed by allocations to the LMR, Eastern, Western, and Scottish Regions. The class did exactly the work it was designed for: light branch passenger trains, mixed traffic on secondary main lines, occasional banking turns, and station piloting in larger yards.

Crews regarded the class as honest and easy to handle. The engines were noted for being sure-footed (their light wheel loadings made them surprisingly slip-resistant), free-running within their modest power, and with good visibility from a relatively comfortable cab, though the most consistent footplate complaint was a draughty and dirty atmosphere in the cab itself, which was unusual given the attention Riddles' team had paid to crew working conditions elsewhere in the Standards range. A minority view held that the class did not steam well, though most depots reported satisfactory performance.

78018's celebrated experience came on 24 February 1955 on the climb from Kirkby Stephen towards Stainmore Summit. Hauling the 4.20am goods of eight 20-ton wagons of limestone, the engine became stuck in a deep snowdrift at Bleath Gill, and the resulting rescue effort, with the locomotive partly buried and a relief engine and shovel-armed party working to dig it out, was filmed by British Transport Films. The resulting short documentary, Snowdrift at Bleath Gill, has been one of the most frequently rebroadcast pieces of railway film ever produced.

The 1955 Modernisation Plan and the Beeching closures of the early 1960s cut the class's working life dramatically short. Riddles' team had designed the Standards for a 30-year service life; in practice the 78xxx members averaged 12 to 14 years. The first withdrawal, 78015 of Darlington, came in November 1963, less than ten years after construction. Withdrawals accelerated: one in 1963, four in 1964, seventeen in 1965, thirty in 1966, and thirteen in 1967, with the class extinct on BR by November 1967. 78053, having spent its whole short life in Scotland, set the record for shortest working life, less than nine years between construction (November 1955) and withdrawal (July 1964).

78000, first of the class, outshopped from Darlington in December 1952. Withdrawn 1965, not preserved.

78015, first of the class to be withdrawn, in November 1963 after less than ten years' service at Darlington.

78018, preserved at the Great Central Railway. Famous for the British Transport Films documentary Snowdrift at Bleath Gill (1955), which followed the locomotive's rescue from a deep snowdrift on the Stainmore route. After 11 years at Barry and a 34-year restoration by the Darlington Railway Preservation Society (completed at the GCR), returned to steam on 6 October 2016.

78019, preserved at the Great Central Railway. Worked banking duties through the Lake District from Kirkby Stephen depot. Withdrawn 1966; rescued from Barry; under overhaul as of the mid-2020s.

78022, preserved at the Keighley & Worth Valley Railway. Notable for its working life at Lostock Hall depot, where it served as Preston station passenger pilot. Returned to service in November 2018 after an 18-year overhaul.

78053, Darlington-built November 1955, spent its entire working life in Scotland; withdrawn July 1964, the shortest service life of any class member at less than nine years.

78059, preserved at the Bluebell Railway and currently being converted to the 2-6-2T variant as new-build 84030. Chosen for the conversion because its tender had been sold off separately at Barry, and because the Bluebell, being on the former Southern Region (where no 78xxx was ever allocated), is a natural home for a tank engine variant. When complete, 84030 will be the only example anywhere of the BR Standard Class 2 2-6-2T, none of the original 84000–84029 having survived.

78064, last of the class built, completed at Darlington in 1956. Withdrawn 1966, not preserved.

Pre-grouping inheritance (none): a wholly BR Standard design with no antecedent fleet on any of the Big Four.

North Eastern Region (1952–c.1965): initial allocations went to NER depots, Darlington, West Auckland, Kirkby Stephen, for branch and secondary work in the North East and over the Stainmore route to Cumbria. 78018's celebrated snowdrift incident at Bleath Gill in February 1955 was recorded while it was based at West Auckland.

London Midland Region: a substantial number worked from depots including Chester Midland, Workington, Willesden, Nuneaton, Crewe South, Shrewsbury, Bolton, and Lostock Hall. 78022's spell as Preston station passenger pilot whilst at Lostock Hall was a typical late-period working. Oxley depot transferred from the Western Region to the LMR in September 1963 with its Class 2 allocation.

Western Region: allocations to Oswestry and Croes Newydd for Cambrian section work, replacing GWR types on the Welsh main and branch routes. Further engines worked from Oxley (later transferred to LMR).

Eastern Region: a small number of class members spent time at Stratford, Doncaster, and March in 1962, and the Canklow and Millhouses depots transferred from the LMR to the Eastern Region in February 1958 with their allocations.

Scottish Region: 78050–78054 were allocated to Scottish depots from new and worked light Highland and west of Scotland routes. 78053, completed at Darlington in November 1955, spent its entire working life in Scotland and was withdrawn in July 1964, the shortest working life of any class member.

By the mid-1960s, with branch closures accelerating, members of the class were being moved to former L&Y lines around Bolton and Lostock Hall for shunting and station-pilot work, a far cry from the branch passenger duties they had been built for.

BR mixed-traffic black (1952–withdrawal): all members of the class were turned out and ran in their entire working lives in plain BR mixed-traffic black with red, cream, and grey lining. Early-built engines (1952–1956) carried the early lion-and-wheel emblem on the tender; the late BR crest was applied from 1956 onwards as locomotives were repainted. The class never carried any other BR livery.

Preservation: the four surviving members have appeared in BR lined black throughout their preserved careers, the only BR livery they ever historically wore. 78059 will appear in BR lined black as 84030 when the Bluebell project is complete.