British Rail Class 376

British Rail Class 376 Electrostar
Class 376 passing Wandsworth Road in 2025
The refreshed interior of a Class 376 unit
In service	16 August 2004 – present
Manufacturer	Bombardier Transportation
Built at	Derby Litchurch Lane Works
Family name	Electrostar
Replaced	Class 421 Class 423 Class 465 Class 466
Constructed	2004–2005
Number built	36
Formation	5 cars per unit: DMS-MS-TS-MS-DMS
Capacity	222 seats plus 12 tip-up
Owner	Eversholt Rail Group
Operator	Southeastern
Depots	Slade Green Ramsgate
Specifications
Car length	DM cars: 19.95 m (65 ft 5 in) MS & TS: 19.69 m (64 ft 7 in)
Maximum speed	75 mph (121 km/h)
Acceleration	0.66 m/s2 (1.5 mph/s)
Electric system	750 V DC third rail
Current collection	Contact shoe
Safety systems	AWS TPWS
Coupling system	Dellner 12
Multiple working	Within class
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge

The British Rail Class 376 Electrostar is a class of electric multiple unit passenger train that was manufactured by Bombardier Transportation at its Derby Litchurch Lane Works. It is part of the Electrostar family, which are the most common EMUs introduced since the privatisation of British Rail. The units were ordered by Connex South Eastern and introduced in 2004/2005 by South Eastern Trains to replace Class 465 and Class 466, which were transferred to Outer Suburban services to Kent to replace the Class 423 slam-door trains.