London Underground Standard Stock

London Underground Standard Stock

Standard stock at Hendon Central, on today's Northern line
Manufacturer Birmingham
Cammell Laird
Feltham
Gloucester
Leeds
Metro Cammell
Line(s) served Bakerloo line
Central line
Northern line
Piccadilly line
Stock type Deep-level tube
Notes
London Transport portal

The Standard Stock title was applied to a variety of Tube stock built between 1923 and 1934, all of which shared the same basic characteristics, but with some detailed differences. This design is also sometimes referred to as 1923 Tube Stock or Pre 1938 Stock. Most of the Standard Stock was built to replace the first generation of "Gate Stock" Tube trains or to provide additional trains for extensions built in the 1920s and early 1930s. Standard Stock cars consisted of motor cars (with a driver's cab, behind which was a "switch compartment" occupying approximately one-third of the length of the car), plus trailer cars and "control trailers" (with a driving cab but no motor). All were equipped with air operated sliding doors, although the guard's door on the earlier trains was a manually operated inward-opening hinged door.

1922 Stock prototype cars

For evaluation purposes, in anticipation of the large number of cars that were to be built over the next several years, six experimental cars were ordered and had been delivered by February 1923. There were five trailers and one control trailer, which were marshalled between French-built "Gate Stock" driving motor cars. A demonstration for the press took place on the Piccadilly line on 3 February 1923, after which the new cars and the French motor cars were moved by road to the Hampstead Line, entering service in August.[1] The French motor cars were part of a batch of 20 which had been rebuilt with air-operated doors, to allow them to work with the 1920 Stock, the first batch of vehicles built with air doors.[2] The trailers and French motor cars formed the inaugural train on the Hampstead Line extension from Golders Green to Hendon when it opened on 19 November 1923.[3]

The builders were given a partial specification, which ensured that each car would have 48 seats and two sets of air-operated double doors on each side, providing an opening which was 4.5 feet (1.372 m) wide. Beyond these basic guidelines, each builder was allowed to build a trailer car to its own design, although externally, they looked very similar. The control trailer was designed by the Underground Electric Railways.[1] The stock became known as the 1922 Stock or Competition Stock and was considered part of the Standard stock fleet.[4]

Production stock

Interior
Switch compartment

The earliest Standard Stock was built for use on the Hampstead tube, which was extended from Golders Green to Edgware and from Clapham Common to Morden in 1923, as well as incorporating the City and South London Railway, which had been rebuilt with larger tunnels. 191 cars were ordered from three manufacturers in 1923, which were formed into five-car trains.[5] The City and South London Railway had been built with tunnels which were only 10.5 feet (3.2 m) in diameter, and had used small electric locomotives to haul trailer cars until it closed for rebuilding in 1923. The reconstruction was completed in 1925,[6] and 69 of the new vehicles were owned by them, while the rest were owned by the London Electric Railway Company.[5]

In a departure from previous practice, where all traction control equipment had been supplied by British Thomson-Houston (BTH), most of the batch were fitted with equipment by Metropolitan-Vickers, which consisted of electro-magnetic contactors arranged to manage the acceleration of the train automatically, with switching from series to parallel connection of the motors handled by bridging them rather than open-circuiting them. Two motor cars had equipment by General Electric Co (GEC), which worked similarly, and was required to work in multiple with the Metropolitan-Vickers equipment. All the vehicles used a C-type door operating engine, which proved to be a poor design. Another 127 cars were ordered in 1924, with most of the motor cars and some of the control trailers using GEC equipment. Cars with GEC controls used WT54 motors, which those with Metropolitan-Vickers equipment used MV152 motors, and although they were interchangeable in theory, in practice they were always kept in pairs. The 1924 cars were fitted with a D-type door engine, which was reclassified as a DL-type after a minor modification had to be made, but proved much more resilient than the earlier C-type, and was used on all Standard Stock until 1931.[7]

Delivery of the cars was not easy, as the Hampstead Line did not have a mainline railway connection to any other line. Consequently, the bodies and bogies were delivered by road, and two large gantries were erected at both Morden and Golders Green depots. A traction engine would arrive at the site with the body, and would position it below the gantries. It would then be raised so that the road wheels could be removed, and a steam crane would position the bogies onto the track. Once the body and bogies were united, a steam engine would remove the complete car, to allow the next one to be assembled.[8]

A further 120 cars were ordered in 1925, with both types of equipment, to cope with the opening of the junction at Kennington and the lengthening of trains to six cars and from 1926, seven cars. Motor cars seated 30 passengers, while trailers had 48 seats. Control trailers had a cab at one end, but no switch compartment, and so seated four less. Trains initially had a crew of three, consisting of a motorman, a front conductor, and a rear guard. The guard signalled the conductor that the train was ready to go, and the conductor signalled the motorman. Once the use of air-operated doors had proved to be successful, modifications were made to enable a train to be operated by a crew of two. Changes included the fitting of a telephone, so that the guard and motorman could communicate, interlocks to ensure that all doors were closed, and the re-routing of the starting bell, so that it could be operated by a guard at the rear of the train, rather than the conductor at the front. These changes were completed by 1927, allowing the reduction of the train crew.[9]

1926 and 1927 builds

The superior nature of the new trains helped to show up the inadequacies of plans to convert large numbers of gate stock cars to have air doors, and they were largely abandoned. Another 112 cars, all fitted with GEC equipment, were ordered from Metropolitan Carriage Wagon and Finance in 1926, and an order for 170 cars followed on in 1927. This enabled trains to be increased to seven cars, and more trains to be operated. A second order was placed with MCWF in 1927, for 136 more cars, but the traction control equipment was supplied by British Thomson-Houston. Their equipment generally proved to be more reliable, and previous batches of Standard Stock were modified so that the main contactors could be replaced with BTH equipment. BTH continued to be the preferred supplier for this equipment for the next 35 years. Metropolitan-Vickers supplied their own motors, but Standard Stock built by other manufacturers used GEC motors. The inter-operability of cars from several manufacturers with three types of traction control was the reason that they were called Standard Stock.[10]

The 1927 builds used a 'Z' bogie, instead of the previous 'Y' bogie, which had wheels of 36 inches (91 cm) diameter, as opposed to 40 inches (100 cm). This required a modification to the WT54 motors, supplied by GEC, which were then known as WT54A motors, and the gearing was altered so that cars with either size of wheels remained compatible. Trials with the 'loudaphone' system by which the guard and motorman could communicate on this stock resulted in it being retro-fitted to the earlier stock.[11]

During this period, many of the Gate Stock cars on the Central line had been converted to air-door operation by the Union Construction Co., which was based at Feltham. Plans were briefly formulated to convert the Gate Stock on the Piccadilly and Bakerloo lines, but analysis showed that the cost of building a new car was only slightly more than the cost of converting an old one, and so an order for 182 new cars was placed. They were known as the 1927 Feltham Stock, although the door plates carried the date 1928, and they were not delivered until 1929 and 1930. The lightweight construction caused problems in later years, when the seat risers and body bolsters developed fractures. With the batch of cars built by MCWF and fitted with BTH equipment, these vehicles enabled Gate Stock to be withdrawn from the Piccadilly line in June 1929, and from the Bakerloo line on 1 January 1930.[12]

1929 and 1930 builds

Another 53 cars were ordered from the Union Construction Co. in 1929, to enable the remaining 1920 Stock cars, which had air doors but were not really suitable for operation on the open sections of the Piccadilly line, to be transferred to the Bakerloo line. An extra train of two motor cars and four trailers was ordered in 1930, to test several new features. They were the last cars to be built by the Union Construction Co., for it was closed as a result of political pressure in 1932. The new motor cars were 1 foot (0.30 m) longer, and the trailers were 2 feet (0.61 m) longer. This was achieved by tapering one or both ends, to prevent them fouling the structure gauge on curves. On two of the trailers, the centre door openings were widened from 4 ft 6 in (1.37 m) to 5 ft 2 in (1.57 m). On the other two, the width of the centre doors was not altered, but the seating capacity was reduced from 48 to 40, to allow the provision of an additional single-leaf door at both ends of the car. The position of the guard's door control panel was altered, although this was not found to be satisfactory, and was dropped from subsequent builds.[13]

Because of the Piccadilly extensions, which were above ground, heaters were fitted, and the use of British materials in its construction was used for publicity purposes, at a time when there was an industrial depression. It became known as the 'All British' train, and operated on the Piccadilly and Northern lines. Transfer between the two was aided by the construction of a junction at Kings Cross in 1927. The Northern line offered heavier traffic, with which to assess the effectiveness of the new features. 62 production cars were ordered from Metropolitan-Cammell, which was formed from the Metropolitan Carriage Wagon and Finance Co. and Cammell Laird at this time, for delivery to the Bakerloo line. They replaced the Watford Joint Stock, which although relatively new, needed a larger crew and had to stop for longer at stations, because of its swing doors. Problems with the swing doors were highlighted by a fatal accident in which a passenger got caught in them, but the door interlock did not detect it.[14]

This build was not initially compatible with other builds, because it was fitted with an electro-pneumatic braking system, as well as the Westinghouse air brake. To accommodate its control, an extra 10-core control jumper was fitted, and previous builds of Standard Stock were gradually altered to include the extra wires, a process which was largely completed by 1936. Standard Stock motor cars which were running on the Bakerloo line with Cammell Laird 1920 Stock trailers were not fitted with the electro-pneumatic brake wiring until the trailers were withdrawn in 1938.[15]

1931 and 1934 builds

In 1929, Government aid enabled plans for extensions to the Piccadilly line northwards to Cockfosters and westwards from Hammersmith to Acton Town, on tracks which were parallel to the District line but not shared with it, to come to fruition. The length of the line increased from 8.5 miles (13.7 km) to 40 miles (64 km), and so more trains were needed. The improvements made for the 1930 build were incorporated into the design, as well as some new features. 145 motor cars were ordered from Metropolitan-Cammell, and 130 trailer cars were shared between two builders. All trailer cars had 12 doors, with two sets of double doors and a single-leaf door at both ends on each side. Electro-pneumatic brakes were fitted, as was a weak-field control, which enabled higher speed running and had been tested on the 1930 build. Its use on the Northern line had demonstrated that the same service intervals could be maintained with four fewer trains.[16]

The final build of Standard Stock was a small batch of 26 motor cars ordered from Metropolitan-Cammell in 1934, after the formation of the London Passenger Transport Board in the previous year. The Piccadilly line was extended from South Harrow to Uxbridge, and this required an extra eight seven-car trains. These were made up from the new motor cars and some reshuffling of stock between other lines. Although very similar to the 1931 build, there were some minor differences. The 1931 build had used motors with roller bearings for the first time, and ten of the new motor cars were also fitted with roller bearing axle boxes, to reduce the amount of maintenance required with white metal bearings.[17] With the completion of the 1934 build, the total number of Standard Stock cars was 645 motor cars, 551 trailers and 270 control trailers.[18]

Allocation

By the time the final cars had been delivered, the standard stock was operating on the Northern, Piccadilly and Bakerloo lines. There were 724 cars on the Northern line, consisting of 336 motor cars, 243 trailers and 145 control trailers. This group comprised all of the cars made in 1923, 1924, 1925 and 1926, supplemented by 62 per cent of the 1927 build by Metropolitan, and 13 of the 1927-built Feltham cars. The Piccadilly line had 509 cars, comprising some of the 1927 Metropolitan and Feltham batches, most of the 1929 Feltham stock, the experimental 1930 Feltham train, and all of the 1931 and 1934 stock. The Bakerloo line also had some of the 1927 Metropolitan and Feltham batches, four cars from the 1929 Feltham build and the 1930 Metropolitan stock. This was a total of 198 cars, made up of 82 motor cars, 62 trailers and 54 control trailers. To make up the number of trains, an additional 20 trailers and 20 control trailers were needed, and these were cars of 1920 Cammell Laird air-door stock.[18]

Between 1935 and 1940, the London Underground benefited from a New Works Programme worth £40 million. This included extensions to the Northern line and the Central line, with delivery of new trains of 1938 Stock beginning in May 1938. The intention was to run the new trains on the Northern line, and transfer the displaced Standard Stock to the Central line, which was using stock built in 1900-1903. In addition, some of the displaced stock would be used on the Moorgate-Finsbury Park "Highbury Branch", also known as the Northern City Line, and some would be used to increase the length of trains on the Bakerloo line to seven cars. 82 control trailers were converted to trailers, and 21 driving motor cars were altered from "A" cars to "D" cars, as the makeup of 7 car trains on the Bakerloo and Central lines had the three-car unit at the opposite end to those on the Northern line.[19]

The Northern City Line had previously been served by surface stock, and had to be modified to accommodate the Standard Stock. Additionally, it had a non-standard arrangement of the third and fourth rails which supplied power to the cars, and these were modified to the same configuration as on the Northern line during the refurbishment.[20] The use of control trailers at one end of a short train was virtually discontinued during the 1930s, because of the risks of disruption to services. A 3-car train consisted on a driving motor car, a trailer and a control trailer (DM-T-CT) and only had one compressor on the motor car. If it failed, the train was stranded, causing delays, whereas a 4-car short train had two motor cars (DM-T-T-DM) and hence two compressors. Failure of one did not prevent the train continuing.[21] The exception to the use of control trailers was the off-peak trains on the Northern City Line, which consisted of a driving motor car and a control trailer, and these 2-car trains continued to run until October 1964.[22]

Central line

On the Central line, Standard Stock began replacing the 1900/1903 Stock in the autumn of 1938, and this action was completed by mid-1939. The Central line used a three-rail system, with a central conductor rail supplying the power, and was not converted to a four-rail system until May 1940. All of the trains were therefore converted to work with the three-rail system as an interim measure, and then converted back to four-rail operation once the track had been modified.[20]

At the time, extensions to West Ruislip, Epping and Hainault were under construction, which would require more trains, but the onset of the Second World War resulted in the extensions being postponed. Nearly 200 cars were stored in the partially built Hainault depot, but that was then requisitioned by the U.S. Army Transportation Corps, and the cars were moved to open sidings. Others were stored on sidings at Edgware, Golders Green, Highgate, Morden, Neasden, and Stanmore, as well as in depots where there was spare capacity. Some of the motor cars were painted grey, and used for engineering duties. Some trains were used for "Tube Refreshment Specials", supplying food and drink to people sheltering from air raids on the underground platforms.[23]

After the war ended, the Central line extensions opened, reaching Stratford on 4 December 1946, Newbury Park and Woodford on 14 December 1947, West Ruislip, Loughton and Hainault on 21 November 1948, and Epping on 25 September 1949.[24] The effects of six or more years of open-air storage on the Standard Stock was severe, and a programme of heavy refurbishment began, which included replacement of warped window frames, renewal of corroded equipment as necessary, and in many cases, complete rewiring. Stations had been lengthened to accommodate 8-car trains before the war, but trains were restricted to 6 cars until the depot at White City could be altered. Some 7-car trains began operating from November 1947, and 8-car trains from the following January. However, the reliability of the refurbished cars was poor, and a full service of 8-car trains was not achieved[25] until additional cars became available from other lines, following the delivery of the 1959 Stock. The achievement was short-lived, as all Standard Stock had been withdrawn from the Central line less than three years later.[26]

8-car trains were formed of two 4-car units, each consisting of two driving motor cars and two trailers (DM-T-T-DM). This arrangement was not ideal at busy times, since there was a section in the middle of the train where there were no passenger doors for almost 50 feet (15 m), caused by the switch compartments behind the driving cabs. In order to alleviate the problem, one of the four-car units was split, and two cars were placed at either end of the other unit. The formation from 1961 thus became DM-T x DM-T-T-DM x T-DM, which reduced loading times at peak periods.[27]

Disposal

1938 Stock replaced the Standard Stock on the Bakerloo line, the changeover being completed on 23 May 1949,[27] although a batch of 1927-built trailers (usually referred to as “58 trailers” because of the number of cars in the group rather than a year reference, as was normally the case with Tube stock classes) were converted to operate with the new stock on the Bakerloo line.[28] The Standard Stock on the Piccadilly line was eventually replaced by the 1959 Stock. This enabled the first large-scale withdrawals and scrapping of Standard Stock, although some of the better cars were transferred to the Central line to complete the 8-car trains.[29]

It was intended that the 1960 Stock would be the prototype for a new batch of trains to replace the Standard Stock on the Central line. However, the service was intensive, and the cars, by now between 30 and 40 years old, could not cope.[30] An electrical fire on one of the trains made a solution more urgent.[27] After 19 trains of 1959 Stock had been delivered to the Piccadilly line, the remaining 57 that formed the order were diverted to the Central line. An additional 57 non-driving motor cars were ordered, to increase the trains from seven cars to eight, becoming the first cars of 1962 Stock.[31] The last of the Standard Stock ran in passenger service on the Central line in June 1963, and on the Piccadilly line in July 1964. Those on the Northern City Line lasted until November 1966.[30]

A number of motor cars saw further service as departmental vehicles. 16 were used as ballast motor cars, with many of them lasting until 1978, and four were used as pilot motor cars.[32] Motor car 3327 was displayed in the Science Museum, London, for many years, but returned to the London Transport Museum in 1996.[33]

Isle of Wight

1927 Stock train arriving at Ryde Pier Head station.

Prior to 1950, there were 55.5 miles (89.3 km) of steam-operated railways on the Isle of Wight. This was reduced to 25.5 miles (41.0 km) between 1952 and 1956, and to just 8.5 miles (13.7 km) in 1966. The Ryde Pier Head–Shanklin section (the Island Line) was retained and electrified,[34] but because of the restricted loading gauge at Ryde Tunnels, smaller-than-normal trains were required.[35]

The Southern Region approached London Transport in 1961, to begin negotiations for some of the Standard Stock then being withdrawn. The initial plan was to fit diesel engines into the motor cars, and to use either electric or mechanical transmission.[36] The first twelve cars were transferred from Ruislip Depot to Wimbledon in August 1964, from where they were moved to Micheldever sidings. Further cars followed in June 1965.[37] In October, a plan to electrify the line was announced, and the idea of fitting diesel engines was dropped. In 1966, the Southern Region had 44 cars at Micheldever, and London Transport had 29 more which were set aside for the scheme. 10 of the Micheldever cars were scrapped, and 12 more were obtained from London Transport.[38]

Overhaul of the electrical and braking systems was done at Acton Works, which involved transferring the cars from Micheldever back to London Transport. This included conversion to work with a three-rail system, rather than the standard London Transport four-rail system. The number of cars to be shipped to the Isle of Wight was reduced from 46 to 43 because of the cost of this work. After overhaul, the cars were transferred to Stewarts Lane, where they were repainted in British Rail blue, and were then taken to the Isle of Wight.[39] They were loaded onto a road vehicle at Fratton belonging to the haulage company Pickfords, and crossed to the island on the Portsmouth to Fishbourne ferry. Care was needed to ensure that the weather and tides were suitable, and motor cars had to be transferred on special sailings, rather than regular crossings, because of the difficulty of unloading a vehicle of this weight without damaging the ship's unloading ramp.[40]

The cars were formed into 4-car and 3-car units, initially designated as 4-VEC and 3-TIS units.[40] Subsequently they became Classes 452 and 451, and were later reclassified to become Classes 485 and 486. Apart from those cut up following accidents at Ryde depot, and other early withdrawals, most of these units were withdrawn between 1988 and 1991,[41] when they were replaced by London Underground 1938 Stock. In October 1990, five cars were returned to London Transport, to form a Heritage Train. They worked under their own power between Fratton and Wimbledon, and were displayed at an open day at Morden Depot, celebrating 100 years of the Northern line.[42]

Manufacturers

Standard Stock is used to describe six experimental cars built by five manufacturers in 1923, and 18 batches of production cars, totalling 1460 vehicles, built by six manufacturers between 1923 and 1934.[43] It became the most prolific class of stock to run on the Underground,[44] which was partly due to the Trade Facilities Act (1921). This was a government initiative in the aftermath of the First World War to fund schemes which would create employment, particularly in the construction, steel and manufacturing industries. The Underground benefited from £5 million of investment from this source, which in addition to funding extensions to the Northern line, financed the construction of over 1,100 Standard Stock cars between 1922 and 1930.[45]

Year Builder Motors Trailers Control
Trailers		 Notes
1923 BRCW — 1 — Experimental
stock
CLCo — 1 —
GRCW — 1 1
Leeds — 1 —
MCWF — 1 —
BRCW — 35 - Production
stock
CLCo 41 40 —
MCWF 40 — 35
1924 BRCW — 50 —
CLCo — — 25
MCWF 52 — —
1925 CLCo 48 — —
MCWF — 5 67
1926 MCWF 64 48 —
1927 MCWF 110 160 36
UCC 77 37 68
1929 UCC 18 17 18
1930 MCCW 22 20 20
UCC 2 4 —
1931 BRCW — 90 —
GRCW — 40 —
MCCW 145 — —
1934 MCCW 26 — —
Totals 1,466 645 551 270  
Key to Builders
BRCW Birmingham Railway Carriage & Wagon Co.
CLCo Cammell Laird & Co. Ltd.
GRCW Gloucester Railway Carriage & Wagon Co.
Leeds Leeds Forge Company
MCCW Metropolitan-Cammell Carriage & Wagon Company Ltd.
MCWF Metropolitan Carriage, Wagon & Finance Co.
UCC Union Construction Company ("Feltham")

Preservation

Several vehicles have been preserved:[46]

Number[T 1] Type Built Builder Location
3209 7 DM 1931 M-C London Underground, Acton Works
3327 — DM 1927 M-C London Transport Museum, Acton Depot
3370 L134 DM 1927 M-C Acton Depot
3690 L130 DM 1934 M-C Acton Works
3693 L131 DM 1927 M-C Acton Depot
3701 L135 DM 1934 M-C Acton Works
3706 2 DM 1934 M-C Acton Works
5279 27 CT 1925 M-C Acton Depot
7061 PC850 T 1931 BRCW Acton Works
7063 PC851 T 1931 BRCW Acton Works
7071 PC855 T 1931 BRCW Acton Works
7281 44 T 1923 CLCo Acton Works
7296 49 T 1923 CLCo Acton Depot
Key to Type
CT Control Trailer
DM Driving Motor
T Trailer
  1. ↑ First number is last number assigned when in passenger service; second number is IoW fleet number (2–49) or LT service stock number (L13x locomotives or PC85x personnel carriers).

Several of the LTM owned cars are now being restored, and it is hoped that they will be formed into a four-car unit (as with the Museum's 1938 tube stock preserved unit).

References

Notes

  1. 1 2 Bruce 1988, p. 53.
  2. ↑ Bruce 1988, p. 49.
  3. ↑ Bruce 1968, pp. 44–45.
  4. ↑ Hardy 2001, p. 54.
  5. 1 2 Bruce 1988, pp. 53–54.
  6. ↑ Bruce 1988, pp. 7, 16.
  7. ↑ Bruce 1988, pp. 54–56.
  8. ↑ Bruce 1968, pp. 42–43.
  9. ↑ Bruce 1988, pp. 55–57.
  10. ↑ Bruce 1988, p. 59.
  11. ↑ Bruce 1988, pp. 59–61.
  12. ↑ Bruce 1988, p. 62.
  13. ↑ Bruce 1988, pp. 63–64.
  14. ↑ Bruce 1988, pp. 64–65.
  15. ↑ Bruce 1988, pp. 65–66.
  16. ↑ Bruce 1988, pp. 67–69.
  17. ↑ Bruce 1988, p. 69.
  18. 1 2 Bruce 1988, p. 127.
  19. ↑ Hardy 1986, pp. 70-71.
  20. 1 2 Hardy 1986, p. 71.
  21. ↑ Hardy 2001, p. 31.
  22. ↑ Hardy 1981, p. 17.
  23. ↑ Hardy 2001, p. 33.
  24. ↑ Bruce 1968, pp. 75-76.
  25. ↑ Hardy 2001, pp. 36-37.
  26. ↑ Bruce 1968, pp. 76-77.
  27. 1 2 3 Bruce 1988, p. 72.
  28. ↑ Hardy 1976, p. 76.
  29. ↑ Bruce 1968, p. 76.
  30. 1 2 Hardy 1981, p. 25.
  31. ↑ Bruce 1968, p. 87.
  32. ↑ Bruce 1987, pp. 91-92.
  33. ↑ Hardy 2002, p. 60.
  34. ↑ Hardy 2003, p. 9.
  35. ↑ Hardy 2003, p. 4.
  36. ↑ Hardy 2003, pp. 10–11.
  37. ↑ Hardy 2003, pp. 12–13.
  38. ↑ Hardy 2003, pp. 14–15.
  39. ↑ Hardy 2003, pp. 16–17.
  40. 1 2 Hardy 2003, p. 18.
  41. ↑ Hardy 2003, p. 90.
  42. ↑ Hardy 2003, pp. 48–52.
  43. ↑ Bruce 1988, p. 127 (table data included)
  44. ↑ Hardy 1986, p. 4.
  45. ↑ Halliday 2013, pp. 101-105.
  46. ↑ Hardy 2002, p. 112.

Bibliography

  • Bruce, J Graeme (1968). Tube Trains Under London. London Transport Board. 
  • Bruce, J Graeme (1987). Workhorses of the London Underground. Capital Transport. ISBN 0-904711-87-0. 
  • Bruce, J Graeme (1988). The London Underground Tube Stock. Shepperton: Ian Allan and London Transport Museum. ISBN 978-0-7110-1707-8. 
  • Halliday, Stephen (2013). Underground to Everywhere. Stroud: The History Press. ISBN 978-0-7524-9772-3. 
  • Hardy, Brian (1976). London Underground Rolling Stock (1st ed.). London: Capital Transport. ISBN 978-0-904711-01-1. 
  • Hardy, Brian (1981). L.P.T.B Rolling Stock 1933-1948. D Bradford Barton. ISBN 978-0-85153-436-7. 
  • Hardy, Brian (1986). Standard Tube Stock Part 1: 1922-1945. Underground (London Underground Railway Society). ISSN 0306-8609. 
  • Hardy, Brian (2001). Underground Train File: Tube Stock 1933-1959. London: Capital Transport. ISBN 978-1-85414-235-1. 
  • Hardy, Brian (2002). London Underground Rolling Stock (15th ed.). London: Capital Transport. ISBN 978-1-85414-263-4. 
  • Hardy, Brian (2003). Tube Trains on the Isle of Wight. London: Capital Transport. ISBN 978-1-85414-276-4. 

Further reading

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