British Rail Class 379
| British Rail Class 379 Electrostar | |
|---|---|
 Great Northern Class 379 at Finsbury Park in 2025 | |
 The interior of Standard Class aboard a Class 379 | |
| In service |
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| Manufacturer | Bombardier Transportation |
| Built at | Derby Litchurch Lane Works |
| Family name | Electrostar |
| Replaced | |
| Constructed | 2010–2011 |
| Number built | 30 |
| Number in service | 20 |
| Successor | |
| Formation |
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| Fleet numbers | 379001–379030 |
| Capacity |
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| Owners |
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| Operators |
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| Depots | |
| Lines served | |
| Specifications | |
| Car body construction | Aluminium alloy, with steel cab ends |
| Maximum speed | 100 mph (161 km/h) |
| Traction system | IGBT–VVVF (Bombardier MITRAC DR1000) |
| Power output | 1.68 MW (2,250 hp) |
| Acceleration | 0.65 m/s2 (2.1 ft/s2) |
| Electric system | 25 kV 50 Hz AC overhead |
| Current collection | Pantograph |
| UIC classification | 2′Bo′+2′Bo′+2′2′+Bo′2′ |
| Bogies |
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| Braking systems | Air (disc) and regenerative |
| Safety systems | |
| Coupling system | Dellner 12 |
| Multiple working | Within class, and with Classes 375, 376, 377, and 378 |
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge |
The British Rail Class 379 Electrostar is an electric multiple unit (EMU) passenger train which was designed and built by Bombardier Transportation. The trains are part of the company's extensive Electrostar family.
In 2007, new trains were proposed to increase capacity on the West Anglia Main Line (WAML), as well as enable the withdrawal of ageing units such as the Class 317 EMUs. 30 4-car Electrostar EMUs were ordered from Bombardier Transportation at a cost of £155 million in 2009, entering service in 2011 as Class 379. They became the principal type operated on the Stansted Express service; as well as running services between London Liverpool Street to Stansted Airport, Cambridge and Kings Lynn. The fleet was initially operated by National Express East Anglia (NXEA) and subsequently by Greater Anglia.
In early 2022, the fleet was withdrawn from service by Greater Anglia owing to high leasing costs, entering long-term storage. In 2025, they returned to service on the Great Northern route.