British Rail Class 458

British Rail Class 458
*Juniper*
British Rail Class 458; Juniper
	Class 458/4 unit at London Waterloo
In service	25 February 2000 – present
Manufacturer	Alstom
Built at	Barcelona, Spain; Washwood Heath, Birmingham;
Family name	Coradia Juniper
Replaced	Class 411; Class 412; Class 421; Class 423;
Constructed	1998–2002
Refurbished	2008–2010 (interior refresh); 2013–2016 (5-car rebuild); 2022–2024 (4-car rebuild, repaint and interior refresh)
Number built	36; (Original fleet of 30, plus 6 converted from Cl. 460)
Number in service	32
Formation	4 cars per 458/0 unit as-built:; DMCO-TSO-MSO-DMCO; 5 cars per rebuilt 458/5 unit:; DMSO-TSO-TSO-MSO-DMSO;
Design code	4-JOP (458/0); 5-JUP (458/5);
Fleet numbers	458/0: 458001–458030; 458/5: 458501–458536; 458/4:458401-458428;
Capacity	As 4-car 458/4s 234 seats; As 5-car units: 270 seats;
Owners	Porterbrook
Operators	Current:; South Western Railway; Former:; South West Trains;
Depots	Current; Bournemouth; Former:; Wimbledon (London);
Specifications
Car body construction	Steel
Car length	DMSO vehs.: 21.01 m (68 ft 11 in); M/TSO vehs.: 19.94 m (65 ft 5 in);
Width	2.80 m (9 ft 2 in)
Height	3.77 m (12 ft 4 in)
Doors	Double-leaf sliding plug (2 per side per car)
Maximum speed	458/0 and 458/4: 100 mph (161 km/h); 458/5: 75 mph (121 km/h);
Traction system	Alstom ONIX 800 IGBT
Traction motors	6 × 270 kW (400 hp) (2 per motor car)
Power output	1,620 kW (2,000 hp)
Electric system(s)	750 V DC third rail
Current collector(s)	Contact shoe
UIC classification	458/0: 2′Bo′+2′2′+Bo′2′+Bo′2′; 458/5: 2′Bo′+2′2′+2′2′+Bo′2′+Bo′2′;
Bogies	Alstom ACR
Braking system(s)	Electro-pneumatic (disc), and regenerative
Safety system(s)	AWS; TPWS;
Coupling system	458/0: Tightlock; 458/4 and 458/5: Voith;
Multiple working	Within class
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge

The British Rail Class 458 Juniper (4-JOP later 5-JUP) is a class of electric multiple-unit passenger trains of the Alstom Coradia Juniper family, built at Washwood Heath between 1998 and 2002 for South West Trains. The order for the original fleet of 30 four-car trains was placed in 1997, and delivery of the first unit followed in October 1998. The fleet entered passenger service between 2000 and 2003 and is maintained at Bournemouth depot.

Between 2013 and 2016, the class was merged with the mechanically similar Class 460 fleet and extensively rebuilt to form a fleet of 36 five-car units—designated Class 458/5—to provide an increase in capacity on services into London Waterloo. The trains are now used by South Western Railway.

In March 2021, South Western Railway announced that 28 Class 458 units would be refurbished for use on long-distance services on the Portsmouth Direct line, as a result of the company deciding to abandon its original plan to use upgraded Class 442 units for this purpose. By 2024, this plan had been dropped, and the refurbished units were instead deployed on limited services out of London Waterloo from 24 June 2024.