British Rail Class 317

The British Rail Class 317 electric multiple units were built by BREL at York Works in two batches, from 1981-82 and 1985-87. They were the first of several classes of British Rail EMU to be based on the all-steel Mark 3 bodyshell, departing from the "PEP"-aluminium design which had spawned the earlier Class 313 to Class 315. The Mark 3 bodyshell was also the basis of Class 318, Class 455, and the diesel "sprinters" pioneered by the Class 150.

British Rail Class 317
Greater Anglia Class 317/1 at Cambridge North in 2017 Greater Anglia Class 317/5 standard-class saloon in 2021
In service	28 March 1983 – July 2022
Manufacturer	British Rail Engineering Limited
Built at	Litchurch Lane Works, Derby (317/1 TCO bodyshells only) Holgate Road Works, York (remainder)
Family name	BR Second Generation (Mark 3)
Replaced	Class 127 Class 302 Class 310 Class 312
Constructed	1981–1982 1985–1987
Refurbishment	2000–2006 (Stansted Express) 2006–2007 (First Capital Connect) 2013–2015 (Greater Anglia) 2015–2018 (London Overground)
Number built	72
Number preserved	2 vehicles
Number scrapped	65
Formation	4 cars per unit; 317/6 units: DTSO-MSO-TSO-DTCO All others: DTSO-MSO-TCO-DTSO
Capacity	As built: 292 seats (22 first-class, 270 standard)
Operator	British Rail c2c Greater Anglia Great Northern First Capital Connect London Overground National Express East Anglia Network SouthEast Thameslink West Anglia Great Northern
Specifications
Car body construction	Steel
Car length	DT vehs.: 19.830 m (65 ft 0.7 in) Others: 19.920 m (65 ft 4.3 in)
Width	2.816 m (9 ft 2.9 in)
Height	3.774 m (12 ft 4.6 in)
Floor height	1.144 m (3 ft 9.0 in)
Doors	Double-leaf pocket sliding, each 1.010 m (3 ft 3.8 in) wide (2 per side per car)
Maximum speed	100 mph (160 km/h)
Weight	DTSO vehs.: 29.5 tonnes (29.0 long tons; 32.5 short tons) MSO vehs.: 49.0 tonnes (48.2 long tons; 54.0 short tons) TCO vehs.: 28.3 tonnes (27.9 long tons; 31.2 short tons)
Current collection method	Pantograph
UIC classification	2′2′+Bo′Bo′+2′2′+2′2′
Bogies	Powered: BREL BP20 Unpowered: BREL BT13
Braking system(s)	Electro-pneumatic (disc) (Westinghouse)
Safety system(s)	AWS TPWS
Coupling system	Tightlock
Multiple working	Within class
Gauge

Class 317/1, no. 317305 at Cambridge on 23rd May 2003. This unit was one of several loaned by WAGN to LTS Rail from 1996-1999, which involved the red stripe of the NSE livery being repainted green. This unit is now numbered 317505 and operated by Greater Anglia.

British Rail Class 317 Media

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  Class 317/2 in BR Blue and Grey livery at Peterborough

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  Greater Anglia Class 317/6 at Hackney Downs in 2015

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  Greater Anglia Class 317/5 on 16 July 2022, the last day of scheduled working

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  WAGN refurbished Class 317/6 at London Liverpool Street in 2006

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  The interior of Standard Class aboard a refurbished Class 317/6

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  First Capital Connect Class 317/1 at Peterborough in 2012

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  The interior of Standard Class aboard a First Capital Connect refreshed Class 317/1

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  London Overground Class 317/8 at Enfield Town in 2017

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  NXEA Class 317/6 at Stratford in 2008

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  Stansted Express Class 317/7 at London Liverpool Street in 2005