British Rail Class 455

Last updated

British Rail Class 455
Class 455 train seen on the Kingston loop line.jpg
South Western Railway Class 455 train seen on the Kingston loop line in October 2024
455901 DTSO Interior.jpg
Interior of a refurbished South West Trains Class 455/9
In service1983–present [1]
Manufacturer British Rail Engineering Limited [1]
Built at Holgate Road Works, York
Family nameBR Second Generation (Mark 3)
Replaced
Constructed1982–1985
Scrapped2022–present
Number built
  • 137
  • (43 × 455/7,
  • with Class 508 TSO vehicles)
  • (74 × 455/8)
  • (20 × 455/9)
Number in service82
Number scrapped55
Successor
Formation4 cars per unit:
DTSO-MSO-TSO-DTSO [1]
Diagram
  • 455/7 & /9 DTSO vehs.: EE226
  • 455/8 DTSO vehs.: EE218
  • 455/7 & /9 MSO vehs.: EC206
  • 455/8 MSO vehs.: EC203
  • 455/7 TSO vehs.: EH219
  • 455/8 TSO vehs.: EH221
  • 455/9 TSO vehs.: EH224 [2]
Fleet numbers
  • 455701–455742
  • 455750 [3]
  • 455801–455874
  • 455901–455920
Capacity
  • As built: 316 seats
  • SN refurb.: 307 seats
  • SWT refurb.: 244 seats [4]
Owners Porterbrook
Operators
Depots
Specifications
Car body construction
Train length81.16 m (266 ft 3 in) [1]
Car length
  • DTSO: 19.83 m (65 ft 1 in)
  • MSO/TSO: 19.92 m (65 ft 4 in) [2]
Width2.82 m (9 ft 3 in) [2]
Height
  • 455/7 TSOs: 3.58 m (11 ft 9 in)
  • All others: 3.77 m (12 ft 4 in) [2]
Floor height1.14 m (3 ft 9 in)
DoorsDouble-leaf pocket sliding
(2 per side per car) [note 1]
Wheelbase Over bogie centres:
14.17 m (46 ft 6 in)
Maximum speed75 mph (121 km/h) [1]
Weight
  • DTSO: 29.5 t (29.0 long tons; 32.5 short tons)
  • MSO: 45.6 t (44.9 long tons; 50.3 short tons)
  • 455/7 TSO: 25.5 t (25.1 long tons; 28.1 short tons)
  • 455/8 & /9 TSO: 27.1 t (26.7 long tons; 29.9 short tons)
Traction system
Traction motors
  • As built:
    4 × English Electric 507-20J, [2]
    each of 153 kW (205 hp)
  • SWR refurbished:
    4 × TSA TME 52-35-4, [7]
    each of 250 kW (335 hp)
Power output
  • As built: 610 kW (820 hp)
  • Refurbished: 1,000 kW (1,300 hp)
Acceleration 0.58 m/s2 (1.9 ft/s2) [1]
Electric system(s) 750 V DC   third rail [1]
Current collector(s) Contact shoe
UIC classification 2′2′+Bo′Bo′+2′2′+2′2′
Bogies
  • 455/7 TSOs: BREL BX1
  • MSOs: BREL BP27
  • Others: BREL BT13 [2]
Minimum turning radius 70 m (231 ft) [2]
Braking system(s)
Safety system(s)
Coupling system Tightlock [2]
Multiple working Within class, and with Class 456
Track gauge 1,435 mm (4 ft 8+12 in) standard gauge

The British Rail Class 455 is an electric multiple unit passenger train built by BREL [1] between 1982 and 1985. It is operated on suburban services in Greater London and Surrey by South Western Railway, as well as formerly by Southern.

Contents

Description

The Class 455 was originally to be classified as the Class 510, which were planned as a 750 V DC version of the Class 317. However, as the chopper control system at the time was not considered robust enough for the electrically rougher third rail Southern Region, they were fitted with GEC Traction camshaft-control systems instead. The Class 510 designation was changed to Class 455.

The class has the same bodyshell as the Class 317 and Class 318, but as they were designed for inner suburban services they do not feature first class seating, air conditioning or toilet facilities and are restricted to 75 mph (121 km/h). [8] Like the Class 317/318, as well as the diesel Class 150, they are based on the British Rail Mark 3, with a steel construction, unlike the earlier PEP based Class 313, Class 314, Class 315, Class 507 and Class 508, which have an aluminium alloy body. [8]

A total of 505 carriages were built by British Rail Engineering Limited's Holgate Road carriage works and together with 43 existing trailers from Class 508s, formed 137 four-car sets. The Class 455 allowed the Class 405 and Class 415 to be withdrawn, as well as allowing the Class 508 units to be transferred to the Merseyside network for which they were originally intended. They also allowed other stock to be cascaded to the North London and Oxted lines. [3]

There were three batches of Class 455 units, all consisting of four cars: driving trailer vehicles at each end, an intermediate trailer vehicle and an intermediate motorised vehicle (powered by four EE507-20J of 185 kW carried on the bogies of the MSO vehicle, some recovered from Class 405s), all originally built to the standard class 3+2 seating arrangement with 316 seats. Technically, they are formed DTSO+MSO+TSO+DTSO. [1]

Class 455/8

Network SouthEast Class 455/8 approaching Waterloo in 1990 BR class 455 5856.jpg
Network SouthEast Class 455/8 approaching Waterloo in 1990

The Class 455/8 units were built between 1982 and 1984. These include all 46 units formerly operated by Southern (allocated to Stewarts Lane depot) and 28 allocated to South Western Railway (at Wimbledon depot). [8] [9]

The last day of service of the Southern Class 455/8 was 14 May 2022. [10]

Class 455/7

Interior of a former Class 508 trailer from a South West Trains refurbished Class 455/7 455732 Cl 508 TSO Interior.jpg
Interior of a former Class 508 trailer from a South West Trains refurbished Class 455/7

The Class 455/7 units were built in 1984–1985. There are 43 four-car units, all allocated to South Western Railway at Wimbledon depot. They differ from the Class 455/8 in having a revised front end (air horns relocated next to the coupler and revised headlamp clusters) that was later used on Class 317/2 and Class 318 units. [11]

No new intermediate trailer (TSO) vehicles were produced for this subclass; instead, they use redundant TSO vehicles that had been removed from Class 508 units prior to those units being transferred to Merseyrail in Liverpool. The reused vehicles can be recognised by their shorter and wider profile compared to 'normal' Class 455 vehicles. [12]

Class 455/9

The Class 455/9 units were built in 1985, and all 20 units are allocated to South Western Railway at Wimbledon depot. [13] These are similar to the 455/7s, except that they had new-build TSOs. [13]

In connection with the Crossrail project, which was rejected in 1994, [14] two trailer cars (71731 from unit 5918; 71732 from unit 5919) were modified to take plug doors. [15] Both were coupled and ran in service in this condition. After an extended period in service, it was found that the modifications had slightly weakened the overall structure. 71732 was re-fitted with sliding doors but 71731 was removed from service, remaining at Eastleigh Works to be cannibalised for spare parts. The latter car served as a demonstrator for the South West Trains refurbished full red livery until it was scrapped in 2005.

Two units later gained replacement carriages that had originally been part of the prototype Class 210 DEMU, which had the same bodyshell. 455912's TSO was replaced by 67400. 455913's MSO 62838, which had been crushed by a cement mixer lorry falling off a bridge, was replaced with 67301, which had originally been a Class 210 DTSO and was later a DMSO in the experimental Class 457. The undamaged end of 62838 was used to replace the former cab end of 67301; the remainder of 62838 was scrapped. [16] [17]

Operations

Current operations

South West Trains / South Western Railway

In February 1996, all South Western division 455s were transferred to South West Trains (SWT). From September 1996, SWT began to modify the Network SouthEast livery with a Stagecoach orange brand added. In November 2004, SWT took delivery of the first unit refurbished by Bombardier, Ashford. [18] The work involved replacing the original seats with high-back Grammar seats (similar to those fitted to Class 450 units) in 2+2 configuration, modifying the doorways so that the sliding doors can open further, and the repainting of the units in a new predominantly-red livery. [19] The last was completed in March 2008. [20]

In April 2013, it was announced that the SWT units would be fitted with a new alternating current traction system provided by Vossloh Kiepe. The project works commenced in June 2014 and involved replacing the original pneumatically-actuated camshaft control system with a solid-state insulated-gate bipolar transistor (IGBT) inverter and variable-voltage/variable-frequency (VVVF) drive, and exchanging the as-built English Electric DC traction motors with new AC units. [5] [6] [21] [22] [23] The upgraded units also received new Knorr-Bremse brake controllers, which allows regenerative braking in addition to the existing rheostatic function. [5] [6]

The new traction motors are each 500 kg (1,100 lb) lighter than the DC originals, [5] and the traction system upgrade as a whole improves reliability and reduces overall operating and maintenance costs. [6] Additionally, as the upgrade reduced the amount of time Class 455 units spent being inspected and serviced in depots, South West Trains were able to proceed with the introduction of new Class 707 units without needing to acquire more depot space. [6]

All units passed to South Western Railway with the South Western franchise change in August 2017. They are used on most London commuter rail routes from London Waterloo to South West London and neighbouring areas. [24]

In early 2024, to mark the upcoming withdrawal of the Class 455s, unit 455868 was repainted into a BR Blue and Grey livery. [25] It will be used in a farewell tour for the Class 455 which is planned for early 2025. [25]

Former operations

British Rail

Deliveries commenced in 1982 to Strawberry Hill. [26] On 16 November 1982, 455805 was unveiled at Waterloo station. The first entered service on 28 March 1983. All were initially allocated to Wimbledon Depot working services on the Central and South Western divisions. The Central Division 455/8s were transferred to Selhurst in 1986 after modifications to the depot were completed. All were delivered in British Rail blue and grey livery; it had been anticipated that some or all 455/9s would be painted in a green variant of the 'Jaffa Cake' London & SouthEast livery, but this was overruled by the BR Design Panel. [27] [28] From 1986 all 455s were progressively repainted in Network SouthEast white, blue and red livery. In May 1991, 455743 was renumbered 455750 and renamed Wimbledon Traincare Depot in recognition of the depot obtaining BS5750 quality services accreditation. [3]

During April 1994, amid the lead up to the privatisation of British Rail, 455801-455846 were allocated to the Network SouthCentral shadow franchise and sold to Eversholt. [1] The remainder were allocated to the South West Trains shadow franchise and sold to Porterbrook. [3] [29]

Connex South Central / Southern

Southern Class 455/8 at Sutton in 2009, showing the updated cab front Hugh llewelyn 455 837 (6438356285).jpg
Southern Class 455/8 at Sutton in 2009, showing the updated cab front
The interior aboard a Southern refurbished Class 455/8 455833 MSO Interior 1.jpg
The interior aboard a Southern refurbished Class 455/8

On 13 October 1996, the Network SouthCentral shadow franchise was taken over by Connex South Central with 455801-455846. In the late 1990s, 16 were repainted in Connex's white and yellow livery. In August 2001, the franchise passed to Southern with all 46 transferred. Some were repainted in Southern's white and green livery. Between February 2004 and February 2006, all were refurbished by Alstom at Eastleigh Works. New 3+2 high back seating as fitted to the Class 377 and the removal of cab end gangways to facilitate the installation of driver's air-conditioning were notable features. [30] [31] [32] [33] [34] [35]

A second refurbishment programme started for the Southern units in June 2012. This included a repaint and interior changes, such as changes to the grab rails on the top between each door. 455808 was the first completed, followed by 455812 in August 2012. The project was completed in December 2013, 455801 being the last unit. [36] [37] [ page needed ]

A third refurbishment programme began in January 2018 for the 455s to become compliant with the PRM 2020 specifications with 455816 being the first one completed. [38]

Southern Class 455 units were used on inner and outer suburban services out of London to destinations in South London and Surrey, before being withdrawn in May 2022. [39] They will not be directly replaced, as the new timetable will be operated by Southern's Class 377 EMUs. [40] A farewell tour for the Southern Class 455 units took place on 14 May 2022. [41]

The first pair of Southern class 455s (455838 and 455839) were sent for scrap on 4 May 2022. [42]

Accidents and incidents

Future

455868 at Sunbury railway station Class 455 units at Sunbury station in March 2024.jpg
455868 at Sunbury railway station

South Western Railway had intended to replace its fleet with Class 701 Aventra units from 2019; [52] however this was initially deferred to mid-2020 [53] and was deferred again to 2021. [54] The first Class 701 Aventra EMUs began to enter service starting on 9 January 2024. [55]

To commemorate the class, unit 455868 was repainted into a blue and grey BR-inspired livery and re-entered service on 7 March 2024. [56]

Fleet details

ClassOperatorQty.Year builtCars per unitUnit numbers
455/7 South Western Railway 381984–19854455701–455703, 455705–455721, 455723-455725, 455727–455735, 455737–455739, 455741–455742, 455750
Scrapped5455704, 455722, 455726, 455736, 455740 [57] [58] [59] [60]
455/8Scrapped481982–1984455801–455847, 455855 [57]
South Western Railway 27455848–455854, 455856–455874
455/9171985455901–455906, 455908–455916, 455919–455920
Stored1455917 [61]
Scrapped2455907, 455918 [62]

Notes

  1. Door throughways 1.010 m (3 ft 3.8 in) on all vehicles, except for 455/7 TSO vehicles at 1.288 m (4 ft 2.7 in). [2]

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Further reading