4-4-0 Steam Locomotives in Great Britain

Class 11/D5 (Locobase 7474)

Data from [], the 4-4-0 entries in Richard Marsden's online LNER Encyclopedia, last accessed on 1 March 2006.

Although the Manchester, Sheffield & Lincolnshire's Parker was the principal designer on this class, the first of the locomotives wasn't actually built until 1895. The boiler contained 231 tubes and a Belpaire firebox. Cylinders were inside and fed by slide valves inclined 1 in 10. By the time they first entered service, the new Chief Engineer Pollitt had determined to use piston valves in place of slide valves and production was stopped in favor of the later 11As.

As they continued in service, the 11As received a new boiler with fewer tubes; it's this variant that is the source of the specifications. Still later, the frames received superheated boilers identical to those in the superheated D6s and were reclassed D5/2. Even so, they never quite fit in the service in which they operated. Bumped from mainline express passenger service, they eventually worked on stopping service in the Cheshire area. As Marsden notes, this usually requires tender-first running, for which a 4-4-0 arrangement is not well suited. As a result, the first D5 went out of service in July 1930 and the last in March 1933.

Class 11A/D6 (Locobase 8971)

Data from C J Bowen Cooke, British Locomotives: Their History, Construction, and Modern Developments (3rd rev and enlarged ed), (London: Whittaker and Co, 1900); and Richard Marsden, "The Pollitt Class D6 (GCR Class 11A) 4-4-0 Locomotives" in his online LNER Encyclopedia at [], last accessed 21 July 2025. Beyer Peacock works numbers were 3980-3981 in 1898 and 3982-3999 in 1899.

Newly appointed Chief Mechanical Engineer Harry Pollitt sized up the Parker Class 11 design of 4-4-0 (Locobase 7474) and concluded that the cylinders would be better supplied by 8" (203 mm) piston valves than the slide valves being fitted. The pistons were located under the inside cylinders and the latter were raised and inclined to make room. He kept the Belpaire firebox, however.

The result was the 11A and series production began in 1897 with a test batch of two and a production run of thirteen. Beyer, Peacock's contract for ten more to be built simultaneously was held up by a strike. Gorton then began work on 20 more, which were finished by Beyer, Peacock in 1899 once the strike was settled.

Class 11B/C/D9 (Locobase 3178)

Data from [] (a page of the ca. 1920 Vulcan Foundry catalogue), Ahrons (1927). See also "GCR Class 11B" in Wikipedia at [], last accessed 7 July 2025. Sharp, Stewart works numbers were 4784-4788 in 1901, 4828-4847 in 1902, 4964-4968 in 1903. Vulcan Foundry produced the last ten (works numbers 1917-1926 in 1904).

Designed by John George Robinson for the newly opened Londone Extension's express service. Wikipedia cites AC Hancox's delightlfully titled 1995 biography The Harmonious Blacksmith Robinson, The Stephenson Locomotive Society in describing their performance in the early days. Observing the 1905 schedule's 60 mph average speed and the likelihood that maximum speeds might hit much higher, Wikipedia comments: "Even with relatively light loads this implies at the least a free-running locomotive. Their long lives (especially in later rebuilt form) suggest robust and trouble-free construction."

According to the Great Central's website -- [], accessed 31 May 2007 -- these American-type Eight-wheelers had the nickname of "bogie pom-poms", although it does not say why. Wikipedia provided the answer: A set of 0-6-0 goods engines produced at the same time acquired the "pom-poms" nicknamed. Since the 11Bs shared some characteristics with those locomotives, but used a leading bogie, drivers and shop workers dubbed them "bogie pom-poms".

Class 11D/D9 (Locobase 21256)

Data from Richard Marsden, "The Robinson Class D9 (GCR Classes 11B, 11C, & 11D) 4-4-0 Locomotives" in his online LNER Encyclopedia at [], last accessed 7 July 2025.

Although the Class 11Bs as delivered (Locobase 3178) had performed capably in express passenger service, John G Robinson almost immediately exploring enlarging the boiler, slightly increasing the grate area, and increasing its boiler pressure.

After tinkering with boiler and grate lengths in two 11Cs, he came up with these 11Ds as the definitive upgrade. As with most early British adoptions of a superheater, the original installations provided only modest areas. A 24-tube superheater boosted steam temperature proved less well suited than the 22-tube variant that became standard just a couple of years after the 24-tube design. (Some of the 11Ds originally used an 18-tube bundle offering 145 sq ft/13.47 sq m) in area; total area came to 1,524 sq ft/141.58 sq m.)

Externally, an extended smokebox made the greatest change in the profile, which retained its square-shouldered Belpaire firebox and graceful connected half-diiameter splashers over the drivers. The boiler's diameter remained 60", but earlier problems with piston valve design had been solved and slide valves gave way to 10" (254 mm) diameter piston valves.

All 40 underwent modifications over the next fourteen years. Marsden reports the displacement from the 11Ds' original .assignments by bigger, more powerful engines such as the 11E (Locobase 2287) and 11F (Locobase 4541). As a result, he continued, "

By Grouping (1923) [as part of the London & North Eastern],, the D9s were concentrated at Sheffield (18) and Annesley (9), with smaller numbers at Immingham, Lincoln, Retford, Mexborough, and Liverpool".

The D9s were the largest passenger locomotives allocated to Sheffield, and they hauled services in all directions. Ever increasing demands in speed and train load led to the LNER's beginning withdrawals of D9s in 1939. Britain's entry into World War Two meant the D9s soldiered on through 1945. By then, their age, heavy use, and lower levels of maintenance had taken their toll. By 1948, 26 remained to be nationalized by British Railways, but the last left the roster in 1950.

Class 11E/Directors (Locobase 2287)

Data from E L Ahrons, The British Steam Locomotive from 1825 to 1925 (London: Ian Allan, 1926). See also "An Eight-Wheel English Locomotive," Railway Mechanical Engineer, Vol 90, No 8 (August 1916) , pp. 395-398; and "Four-Coupled Superheater Express Engine, Great Central Railway", Locomotive Magazine, Volume XIX [19], No. 255; and Graham Glover, British Locomotive Design 1825-1960 (London: George Allen & Unwin Ltd, 1967).

Glover observed that 4-4-0s with inside cylinders "made a somewhat sensational reentry on the Great Central with the very competent Directors ...." designed by JG Robinson. RME commented favorably on the "entire absence of complication of detail [in the inside motion] and frictional losses are thereby reduced to a considerable extent, so that the engine develops its power under the most favorable circumstances."

They equalled the 4-4-2s on the GCR in performance, wrote Graham Glover, aided by a firebox with 4 sq ft (0.4 sq m) more heating surface (157 sq ft/14.6 sq m total), a boiler 63" in diameter (1,600 mm) as opposed to the Atlantics' 60"/1,524 mm) in a design that weighed 10 tons less in running condition. Elements of the design included a Belpaire firebox and 10" (254 mm) piston valves positioned over the inside cylinders. (Note: RME's 1916 article reported 210 sq ft (19.51 sq m) of superheater area shown in the specs. Both the 1913 LM article and Ahrons' later account reported 304 sq ft (28.25 sq m).

Indeed, says RME, the class had "proved successful in every way in hauling the fastest and heaviest trains on that road" being "economical in fuel consumption, and ...capable of reaching very high speeds with heavy train loads." Coal consumption of 39 lb/mile (11 kg/km) was only slightly higher than the compound superheated 4-4-2s.

The LNER took these engines in as Class D10; D11 Improved Directors class appeared as a further improvement in 1919-1922 (see Locobase 4541).

Class 11F Improved Directors / D11 (Locobase 4541)

Data from "New 'Director' Class Locomotive, Great Central Railway", Locomotive Magazine, Volume XXVI [26] (15 April 1920), p. 74. See also Richard Marsden, "The Robinson Class D11 (GCR Class 11F) 'Improved Director' 4-4-0 Locomotives" on Marden's LNER Encyclopedia website at [], last accessed 9 August 2020; and "D11 62660 - 62694 4-4-0 GCR Robinson Large Director" on the Preserved British Steam Locomotives website at []; and "

62660 Butler Henderson (GCR 506, LNER 5506, LNER 2660 & BR 62660) at [], both last accessed 21 July 2025. Kitson works numbers were 5379-5390 in 1924. Armstrong-Whitworth works numbers were 605-616 in 1924.

Gorton delivered the first six in 1919 for the GC's London Extension, these were Directors (Locobase 2721) with better internal steam distribution. One change was the adoption of 38 fewer small tubes in a bundle of tubes each 1//8" (3.18 mm) greater in diameter than those in the 1913 engines.

11Fs retained the Belpaire firebox configuration used in earlier GCR 4-4-0s, all-inside link motion, and the straight-topped splashers of the 11Es/D10s. Marsden noted that a key feature was the adoption of inside-admission piston valves that measured 10" (254 mm) in diameter. LM's report paid particular attention to the new cab that was "a most commodious and convenient form." Side windows and a roof that extended well back afforded "excellent protection from the weather even under the worst conditions of side wind.".

Apparently counseled by John G Robinson, Nigel Gresley, late of the Great Northern and then Chief Mechanical Engineer of the newly formed London & North Eastern group Nigel Gresley ordered 24 more D11s in 1924. According to Richard Drew ([]), this class came to be considered "among the finest 4-4-0s to be built in Britain."

He adds that Nigel Gresley added 24 to the class for Scottish sections of the grouped LNER. Marsden added a good deal of detail. Compensating for the "relatively restrictive [former NBR or North British Railway] loading gauge", Gresley flattened the D11's dome and adopted his "flowerpot" chimneys. Marsden acknowledges that the NBR crews found the "foreign" Great Central D11/2 design "took some adjusting". He adds that it was "also true that the D11/2s became very popular locomotives with the NBR engine crews."

Long-travel piston valves added in the late 1930s and were credited with a 5 % savings in coal consumption.

Class 2/2A / D7 / Green Bogies (Locobase 7472)

Data from [], the 4-4-0 entries in Richard Marsden's online LNER Encyclopedia, last accessed on 1 March 2006; and 1923 GCR diagram reproduced on Facebook at [], last accessed 21 September 2022. See also "History" on the GCR567 Locomotive Group at [], last accessed 21 September 2022. Kitson works numbers were 3010 in 1887, 3440-3451 in 1892

When the Manchester, Sheffield & Lincolnshire (MS & L) exhibited at the 1887 Manchester Exhibition, they showed two locomotives - one of their own and this one from Kitson & Company. A gap of three years followed, then the MS&L and its successor, the GCR, built four batches from 1890-1894. Kitson supplied twelve, the railway's Gorton shops the rest.

Even for their day, these were small for a British 4-4-0 design. At service advent, however, these were the MS&L's mainline express engines and regarded as economical and quite satisfactory.

From 1913-1923, all of the 2 (leaf spring) and 2A (coil spring) had their original round-top boilers replaced with Belpaire boilers. LNER's takeover meant the substitution of the Grouping leader's "flowerpot" stacks for the stovepipes originally fitted.

Retirements began in 1926 and extended over the next 13 years. During the first years of the LNER, they were painted in passenger colors and were thus known as "Green Bogies."

Beginning in 2017, the 567 Group announced that the first components of the new-build 567 had taken shape. The 567Group projected that "It is estimated it could be complete in ten years at a cost of around half a million pounds."

By July 2018, the group received the two plate frames that form the backbone of the engine. Delays attributable to the COVID-19 pandemic slowed several new-build steam locomotive projects in Great Britain. In March 2021, the group could report progress on the bogie frame and wheelsets and the delivery of the cylinder casting..