The British Rail Class 317 is an electric multiple unit (EMU) passenger train constructed by British Rail Engineering Limited in two batches: 48 sets were produced in 1981–82 and 24 sets in 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, Class 507 and Class 508. The Mark 3 bodyshell was also the basis of Class 318, Class 455 and the diesel Class 150. The Class 317 uses overhead alternating current electrification. All units were withdrawn in July 2022.
Greater Anglia Class 317/1 at Cambridge North in 2017
Greater Anglia Class 317/5 standard-class saloon in 2021
First Capital Connect (ex. WAGN) Class 317 at Welwyn Garden City
Class 317/2 in BR Blue and Grey livery
British Rail Engineering Limited
British Rail Engineering Limited (BREL) was the railway systems engineering subsidiary of British Rail.
The InterCity 125 was formed from Class 43 powercars built at Crewe Works and Mark 3 carriages built at Derby Litchurch Lane Works
Mark 2 carriages were built by BREL's Derby Litchurch Lane Works
Class 58 locomotives were built by BREL's Doncaster Works
An APT-P at Crewe in October 2006