British Rail Class 450

Infobox train
name = British Rail Class 450 "Desiro"

---

imagesize = 300px
caption = 450083 at Waterloo
background = #274488
Manufacturer = Siemens AG
Family = Desiro
Formation = 4 cars per trainset
designation = 450001–450042 450071–450127 450543–450570
yearconstruction = 2001–2006
yearservice = 2003–2006
numberbuilt = 127 trainsets
numberinservice = 127 trainsets
InService = 2003–
Weight = Total: 170 tonnes
Capacity = 450/0 24 first class, 240 standard class per trainset - 450/5 240 standard class per trainset
CarBody = Aluminium
CarLength = convert|20.4|m|ft|abbr=on
CarWidth = convert|2.796|m|ft|abbr=on
art-sections = Inter-unit and inter-vehicle flexible diaphragm
doors = Plug sliding 1/4 and 3/4 position
MaxSpeed = convert|100|mph|abbr=on
Gauge =
Brakes = Air, regenerative
Engine =
Operator = South West Trains
Power-supply = Third rail
Voltage = 750V DC

The British Rail Class 450 third rail DC EMU (or 4Des) began service during 2003. They are a part of the Siemens "Desiro" modular train family and are more popularly known as the 'Blue Desiro'. In standing with requirements of all new rolling stock for the South East region, provision has been made for future conversion to 25 kV AC overhead supply or dual voltage, although at present no trains have been fitted with a pantograph. Used for outer suburban services, the Class 450 is fitted with Standard and First accommodation. The unit has a maximum speed of convert|100|mph|abbr=on.

Introduction

In April 2001 785 vehicles were ordered by South West Trains in order to complete the replacement of its slam door rolling stock. Introduction to service was delayed by the required power supply upgrades capable of powering the new trains. In the December 2004 timetable change the Class 450 "Desiro" began serving most intended routes, although introduction was delayed until June 2005 in some areas. The units are leased by Angel Trains to South West Trains.

68 new vehicles were ordered by South West Trains as a replacement to the growth order which was diverted to form the Class 350 range of electric multiple units.

The automated announcements of South West Trains' Desiro units feature a female voice - that of Celia Drummond of Northern Line fame - as opposed to the original voice of Phil Sayer, who will remain on the platforms.

Formation

The entire Class 450 series consists of four car multiple units, semi permanently formed as DMSO(A)+TCOL+TOSLWB+DMSO(B). Units are numbered in the range 450001-110.

*63201-63300 and 63751-63760 - DMSO(A)
*64201-64300 and 66851-66860 - TCOL
*68101-68200 and 66801-66810 - TOSLWB
*63601-63700 and 63701-63710 - DMSO(B)

Operations

The Class 450 "Desiro" trains mainly operate outer suburban services from London Waterloo, as well as local services outside of the London area. These include:

* London Waterloo to Alton
* London Waterloo to Basingstoke (all stations from Woking)
* London Waterloo to Reading (Most services operated by Class 458)
* London Waterloo to Poole (a duty shared between 444/450 units)
* London Waterloo to Weybridge (via Hounslow)
* London Waterloo to Windsor and Eton Riverside
* London Waterloo to Portsmouth Harbour
* Hounslow Loop
* Ascot to Guildford
* Portsmouth & Southsea/Portsmouth Harbour to Southampton Central (all stations)

They can also be found on inner-suburban services, usually operated by Class 455 units, particularly in the peaks and on Sundays during periods of engineering work.

Class 450 "Desiro" trains are now being used on the Portsmouth Direct Line for London Waterloo to Portsmouth Harbour services in place of Class 444 "Desiro" units. The decision to use Class 450 "Desiros" has been a cause for complaint from passengers specifically because of the 3+2 seating arrangement. [cite news
url = http://news.bbc.co.uk/1/hi/england/hampshire/6288115.stm
title = Commuter protest over rail seats
date = 2007-01-22
accessdate = 2008-01-29
publisher = bbc.co.uk
work = BBC News
quote = Commuters travelling between Portsmouth and London have set up a campaign group to try and change the new trains used on the railway line. A shake-up of rolling stock led to high density seating, designed for suburban journeys, being introduced on the line. Ian Johnston, of SWT, said: "It's about providing capacity on the lines of route where it's most needed. The dilemma we have is people either have to stand or we provide a seat, which may, in their opinion, be less comfortable than they were used to." The changes have provided 4,500 extra seats at peak times. ]

The Class 450/2 & more orders

Originally, SWT’s order with Siemens was for 100 four-car sets (the current 450/0) and for 32 five-car sets which would be for inner-suburban use. The SRA, however, did not agree to the terms required, such as the lengthening of platforms and changes to railway infrastructure. As a result the 32 five-car sets were cancelled and an extra 10 four-car sets were added to the order. The SRA took the opportunity to order 30 four-car sets of the dual-voltage Class 350.

More recently, SWT have received the order of a further 17 four-car sets. This brings the total number of Class 450 units up to 127. These units were delivered in 2006, not long after the last of the first order is delivered. 450101 was damaged in Belgium and returned to Wildenrath to have repairs conducted by Siemens, therefore delaying its entry in to the UK. 450101 arrived in the country on May 242006 and was briefly in service on June 52006. The train started working full time on June 72006.

Class 450/5 modifications

In January 2008 a fleet of modified 450/0 sets were re-numbered in the 450/5 series, for use on services between Waterloo and Windsor as well as between Waterloo and Weybridge. They have had their first class seating removed and replaced with 2+3 formation standard class seating, and some other seats have been removed to provide more standing capacity; extra handrails have also been provided. The numbers modified are 450043 to 450070, which have become 450543 to 450570 respectively and display the letters 'HC' under the unit number on the front of the sets. The upgrades have been carried out at Bournemouth [cite web|url=http://www.therailwaycentre.com/News%20January%202008/240108_SWT.html|title=High capacity Class 450 Desiro sets enter traffic|date=2008-01-24|accessdate=2008-01-29|publisher=TheRailwayCentre.com] .

External links

* [http://www.siemenstransportation.co.uk/ Siemens Transportation]
* [http://www.semgonline.com/gallery/class450_01.html Southern E-Group]
* [http://www.therailwaycentre.com/Recognition%20Tech%20Data%20EMU/EMU_450.html Technical Data File]

References