Livery and numbering system For most of its existence the Southern Railway painted its 2,390 locomotives in a rich yellow/brown olive green, with plain black frames and wheels, and fittings were lined in black with thin white edges. From 1937, the basic livery was changed by Bulleid to a matt blue/green malachite green that was similar in appearance to copper carbonate. This was complemented with black wheels and frames with bright yellow lettering and lining-out of the various locomotive fixtures. Some of Bulleid's locomotives had their wheels painted in malachite green with yellow rims, though this combination was scarcely used. Pre-grouping and Maunsell locomotives were given yellow and black lining to complement the malachite green livery. During the Second World War, engines that went for overhaul were painted in an overall matt black due to the scarcity of paint and labour. The yellow lettering remained, highlighted with malachite green. The period leading up to nationalisation in 1948 saw a reversion to malachite green, albeit in gloss form. Below are examples of Southern Railway livery, including the approximate dates of first application: • Gloss black (common to most freight designs at grouping, adopted by Maunsell as standard in 1923) •
LBSCR dark umber (1905–1923) •
LSWR Urie sage green (1912–1924; this became the standard passenger locomotive livery immediately after grouping) • LSWR holly green (1912–1923; freight livery inherited from the LSWR at grouping) •
SECR grey (until 1923; inherited from the SECR at grouping) • SR Maunsell olive green (1924–1939; introduced as the first standard passenger livery for the Southern Railway) • Wartime matt black (1940–1950; a wartime labour-saving livery) • SR Bulleid light green (1938–1940; first applied to N15 and H15 classes, dropped in favour of malachite green) • SR Bulleid malachite green (1939–1950; became standard livery for all Southern passenger locomotives) Maunsell locomotives featured name and number plates of polished brass with a red or black background in 1924. Bulleid nameplates were generally gunmetal with polished brass lettering, and featured crests depicting aspects of the class theme (Merchant Navy, West Country or Battle of Britain). Until 1931 the Southern Railway initially maintained the locomotive numbers from its constituents, and solved the problem of more than one locomotive having the same number by letter prefixes denoting the main works of the former owning company. All ex-SECR locos were prefixed by "A" (for Ashford), ex-LBSCR by "B" (for Brighton) and ex-LSWR engines by "E" (for Eastleigh). Isle of Wight locomotive numbers were prefixed by "W" (for Wight). New locomotives were prefixed by the letter of the works where they were built. In 1931 the fleet was re-numbered by dropping all prefixes, leaving E-prefixed numbers unchanged, adding 1000 to A-prefixed numbers and 2000 to B-prefixed ones, an exception being the Z-class 0-8-0 shunters whose numbers A950-A957 only lost the prefix, with no addition. (Some non-revenue-earning locos were exempt from this scheme). Under Bulleid, a new continental system of numbering was introduced for his own locomotives, based upon his experiences at the French branch of
Westinghouse Electric before the
First World War, and his tenure in the rail operating department during that conflict. The Southern Railway number adapted a modified
UIC classification system where "2" and "1" refer to the number of un-powered leading and trailing axles respectively, and "C" refers to three driving axles (the system was only applied to new 6-coupled locos and one Co-Co electric loco before nationalisation). As an example, the first Merchant Navy class locomotive was numbered 21C1.
Motive power The Southern Railway inherited in the region of 2,281
steam locomotives from its constituent companies at grouping From the major constituents, excluding the Isle of Wight and some minor railways, this was composed of: One of
Holcroft's first tasks on joining the SR from his post with the SE&CR at
Ashford was to produce an overall stock list and diagram book so that the capacity and
route availability of unfamiliar loco classes could be understood across the railway, allowing locos to operate outside of their former areas. He produced a grading system so that an express passenger class such as the
LSWR N15 King Arthurs might be graded as P5/8/3 for Passenger, Grade, Power and Range (route availability). The railway handed over in the region 1,789 locomotives to British Railways in 1948. Similarly, it inherited 84 DC
multiple units (later designated
3-SUB) from the LSWR and 38 AC units (later designated
CP and
SL classes) from the LBSCR, and handed over in the region of 1480
DC units.
Steam locomotives From 1924, Maunsell began standardising the fleet of locomotives for ease of maintenance. Later Bulleid undertook sweeping changes that propelled the Southern Railway into the forefront of locomotive design. The first locomotives constructed for the Southern Railway were to designs inherited from the pre-Grouping railway companies, such as the
N15 class and
H15 class, though both were modified by
Maunsell from the original design. These were intended as interim solutions to motive power problems, since several designs in operation on the Southern Railway were obsolete. The 1920s was the era of standardisation, with ease of maintenance and repair key considerations in a successful locomotive design. In 1926, the first new Southern Railway-designed and -built locomotives emerged from Eastleigh works: the Maunsell
Lord Nelson class, reputedly the most powerful 4-6-0 in Britain at the time. So successful was the Lord Nelson class that the
Royal Scot class had its origins in the Maunsell design. However, the Depression of 1929 precluded further improvements in Southern Railway locomotive technology, apart from the
V "Schools" class 4-4-0 and various electric designs. Maunsell also designed locomotives for use in freight yards such as that at
Feltham in south west London, the final example of which was the
Q class. The design of the Q class coincided with Maunsell's ill health, resulting in a conservative approach to design. The first examples were completed in 1937, the year in which Maunsell retired from the CME's position. Maunsell was succeeded in 1937 by
Oliver Bulleid, who brought experience gained under Sir
Nigel Gresley at the LNER. He designed the
Bulleid chain-driven valve gear that was compact enough to fit within the restrictions of his
Pacific designs, the
Merchant Navy class of 1941 and the
Light Pacific design of 1945. Ever the innovator, Bulleid introduced welded steel boilers and steel
fireboxes which were easier to repair than the copper variety, whilst a new emphasis on cab ergonomics was followed. Established locomotive design practices were altered in his designs, with the wheels changed from the traditional spoked to his
BFB disc wheel design, giving better all-round support to the tyre. Visually, the most distinctive of his designs was a small, heavy freight locomotive, the most powerful and last non-derivative
0-6-0 design to operate in Britain. With innovative lagging material that dictated the shape of the boiler cladding, the Q1 was regarded by many as one of the ugliest locomotives ever constructed. The 40 engines produced required the same amount of material needed for 38 more conventional machines, justifying the economies and design. Bulleid's innovation stemmed from a belief in the continued development of steam traction, and culminated in the
Leader class of 1946, an 0-6-6-0 design that had two cabs, negating the use of a turntable. The entire locomotive was placed on two bogies, enabling negotiation around tight curves, while the slab-sided body could be cleaned by a labour-saving carriage washer. Despite the successes of the
Pacifics and the unconventional Q1 freight locomotives, the
Pacifics were difficult to maintain and featured enough eccentricities to justify rebuilding in the mid-1950s. The innovations ensured that the Southern was once again leading the field in locomotive design, and earned Bulleid the title "last giant of steam" in Britain.
Diesel locomotives Maunsell began experimenting with the use of
diesel locomotives for yard
shunting in 1937. He ordered three
locomotives, which proved to be successful, but his retirement and the onset of the
Second World War prevented further development. Bulleid adapted and improved the design but his
class did not appear until 1949, after nationalisation. Bulleid also designed a
class of
main line diesel-electric locomotives, continuing to push back the boundaries of contemporary locomotive design and established practice, but this was built by
British Railways.
Electric locomotives The Southern Railway also built two
mixed-traffic electric locomotives, numbered CC1 and CC2 under Bulleid's numbering system. They were designed by Bulleid and
Alfred Raworth, and were renumbered 20001 and 20002 after nationalisation. At this time a third locomotive was under construction, and was numbered 20003 in 1948. The locomotives were later classified as
British Rail Class 70. These incorporated a cab design similar to that of the
2HAL (2-car
Half
Lavatory electric stock) design constructed from 1938. This was due to ease of construction by welding, which allowed both cheap and speedy construction. With the outbreak of war in 1939, most new locomotive construction projects were put on hold in favour of the war effort, although construction of CC1 and CC2 was exempted from this because of promised savings in labour and fuel over steam locomotives.
Electric Multiple Units (EMUs) unit no. 3131, at the
National Railway Museum. The early LBSCR AC overhead
Electric multiple units (EMU) were phased-out by September 1929 and converted into DC types. All further electrification was at 660 V DC, and investment was made in modernising the fleet inherited from the pre-Grouping companies, and building new stock often by converting existing steam hauled
carriages. The Southern Railway's EMU classification meant the unit type was given a three-letter code (sometimes two letters), prefixed by the number of carriages within each unit. These early
suburban units, constructed between 1925 and 1937 were therefore designated 3-SUB, or later 4-SUB, depending on the number of coaches. The EMUs consisted of a fixed formation of two driving units at both ends of the train, and could have varying numbers of carriages in between (as indicated in the classification). Newly built units of
4-LAV,
6PUL and 5BEL (
Brighton Belle) types were introduced in 1932 for the electrification of the
Brighton Main Line. Further types were introduced as electrification spread further. Thus the
2-BIL units were constructed between 1935 and 1938 to work long-distance semi-fast services to Eastbourne, Portsmouth and Reading, or the
2-HAL for those to Maidstone and Gillingham.
4-COR units, handled fast trains on the
London Waterloo railway station to
Portsmouth Harbour railway station from April 1937. A total of 460 electric vehicles were to be built by the Southern Railway before nationalisation. Variants of the Southern Railway's electric stock included Pullman carriages or wagons for the carriage of parcels and newspapers, allowing flexibility of use on the London suburban lines and the Eastern Section of the network. Similarly, a
Sentinel steam railcar was purchased in 1933 for use on the
Devil's Dyke branch. It was transferred from that line in March 1936 and tried in other areas, but was withdrawn in 1940.
Carriages The Southern inherited many wooden-bodied carriage designs from its constituent companies. However, there was an emphasis on standardising the coaching stock, which led to Maunsell designing
new carriages. These were classified between 0 and 4, so that an -wide carriage was "Restriction 0". The restrictions related to the Southern's composite
loading gauge, so that some more restricted routes could be catered for. The new carriages were based upon the former LSWR "Ironclad" carriage designs, and comprised First and Third Class compartments, each of which contained a corridor and doors for each compartment, enabling quick egress on commuter services. This made maintenance easier, as the location of a particular set would always be known through its number, which was painted on the ends of the set. A pool of "loose" carriages was kept for train strengthening on summer Saturdays and to replace faulty stock. However, further orders for these trains were not placed due to cramped conditions inside which were dictated by the restrictions of the loading gauge. As the railway was primarily passenger-orientated, there was little investment in freight wagons except for general utility vans, which could be used for both freight and luggage. These consisted of bogie and four-wheel designs, and were frequently used on boat trains. At its peak the Southern Railway owned 37,500 freight wagons; in contrast, the Railway Executive Committee controlled 500,000 privately owned colliery wagons during the Second World War. == Cultural impact ==