British Rail Class 379

British Rail Class 379
*Electrostar*
British Rail Class 379; Electrostar
	Greater Anglia Class 379 at Bethnal Green in 2012
	The interior of Standard Class aboard a Class 379
In service	Great Northern:; 10 February 2025 – Present; Other operators:; March 2011 – February 2022;
Manufacturer	Bombardier Transportation
Built at	Derby Litchurch Lane Works
Family name	Electrostar
Replaced	Class 317; Class 387;
Constructed	2010–2011
Number built	30
Number in service	2
Successor	Class 720; Class 745;
Formation	4 cars per unit:; DMSO-MSO-PTSO-DMCO;
Fleet numbers	379001–379030
Capacity	209 seats; (20 first-class, 189 standard);
Owners	Current:; Porterbrook; Former:; Rail Logistics Europe (Akiem); Macquarie European Rail;
Operators	Current:; Great Northern; Former:; Greater Anglia; National Express East Anglia;
Depots	Current:; Hornsey; Former:; Ilford;
Lines served	Current:; Great Northern route; Former:; Fen Line; Stansted Express; West Anglia Main Line;
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(s)	25 kV 50 Hz AC overhead
Current collector(s)	Pantograph
UIC classification	2′Bo′+2′Bo′+2′2′+Bo′2′
Bogies	Powered: Bombardier P3-25; Unpowered: Bombardier T3-25;
Braking system(s)	Air (disc) and regenerative
Safety system(s)	AWS; TPWS;
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In early 2022, the fleet was withdrawn from service by Greater Anglia owing to high leasing costs, entering long-term storage.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, being operated by Govia Thameslink Railway on Great Northern services.