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The British Rail Class 379 Electrostar is an electric multiple-unit (EMU) passenger train designed and built by the rolling-stock manufacturer Bombardier Transportation. The trains are part of the company's extensive Electrostar family.

Quick facts: British Rail Class 379 Electrostar, In servic...
British Rail Class 379 Electrostar
Greater Anglia Class 379 at Bethnal Green in 2012
The interior of Standard Class aboard a Class 379
In serviceMarch 2011[1]  February 2022[2]
ManufacturerBombardier Transportation
Family nameElectrostar
ReplacedClass 317
Number built30[3]
  • 4 cars per unit:
Fleet numbers379001–379030
  • 209 seats
  • (20 first-class, 189 standard)[3][4]
Line(s) served
Car body constructionAluminium alloy, with steel cab ends[3]
Maximum speed100 mph (161 km/h)[5]
Traction systemIGBTVVVF (Bombardier MITRAC DR1000)
Electric system(s)25 kV 50 Hz AC overhead
Current collector(s)Pantograph
UIC classification2′Bo′+2′Bo′+2′2′+Bo′2′[3]
  • Powered: Bombardier P3-25
  • Unpowered: Bombardier T3-25[3]
Braking system(s)Air (disc) and regenerative[3]
Safety system(s)
Coupling systemDellner 12[3]
Multiple workingWithin class, and with Classes 375, 376, 377, and 378[3]
Track gauge1,435 mm (4 ft 8+12 in) standard gauge

The Class 379 was specifically procured in response to a government white paper issued in 2007, under which £185 million of investment was issued to the West Anglia Main Line (WAML), the bulk of which was spent with Bombardier Transportation to procure the 30-strong Class 379 fleet of EMUs.[1] While the type was largely intended to increase capacity, its introduction did enable the withdrawal of ageing units such as the Class 317 EMUs; the programme also involved various infrastructure improvements. The Class 379's introduction was relatively smooth and brought about a noticeable step up in service quality.[1]

Since their introduction during early 2011, the Class 379 became the principal type operated on the Stansted Express service; it was also tasked with additional services between London Liverpool Street to Stansted Airport, Cambridge and Kings Lynn.[6][full citation needed] The fleet was initially operated by National Express East Anglia (NXEA)[7] and subsequently by Greater Anglia.

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