The British Rail Class 508 (4PER) electric multiple unit (EMU) passenger trains were built by British Rail Engineering Limited, at Holgate Road carriage works, York, in 1979 and 1980. They were a variant of British Rail's standard 1972 design for suburban EMUs, eventually encompassing 755 vehicles and five classes (313/314/315/507/508). They mostly worked on the Merseyrail network from 1982 until withdrawal on 16 January 2024.