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| numberbuilt = 127 trainsets | numberinservice = 127 trainsets | service = 5 October 2003 - present | weight = Total: | capacity = 24 first class, 240 standard class per trainset | carbody = Aluminium | carlength = | width = | art-sections = Inter-unit and inter-vehicle flexible diaphragm | doors = Plug sliding 1/4 and 3/4 position | maxspeed = | gauge = | brakes = Air, regenerative | operator = South West Trains | powersupply = | electricsystem = 750 V DC Third rail }} The British Rail Class 450 third-rail DC EMU began service during 2003. They are a part of the Siemens ''Desiro'' modular train family and are more commonly 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 was built with standard and first class accommodation. The unit has a maximum speed of . The Siemens "Desiro UK" family also includes units of Classes 185, 350, 360, 380 and 444. These trains are the most numerous trains in South West Trains's fleet, and also the most numerous units in the Desiro UK family. == Introduction == In April 2001, 785 vehicles were ordered by South West Trains in order to complete the replacement of its slam-door rolling stock (the slam-door trains were coming to the end of their useful lives and did not meet up with modern health and safety requirements). 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 similar 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. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「British Rail Class 450」の詳細全文を読む スポンサード リンク
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