British Rail Class 507

The British Rail Class 507 is a class of 33 three-car electric multiple units built by British Rail Engineering Limited at its Holgate Road carriage works in York from 1978 to 1980. It is a variant of British Rail's standard 1972 design for suburban electric multiple units, derived from the PEP stock, a family that eventually covered 755 vehicles across Classes 313, 314, 315, 507 and 508. The units were ordered to replace the life-expired Class 502 on the Merseyrail Northern line after Class 313 sets proved the type suitable for the new Link tunnel, and the first set arrived at Birkenhead North depot in September 1978. All of the sets worked on Merseyrail from new, were refurbished by Alstom at Eastleigh between 2002 and 2005, and were replaced by the Class 777, the class being withdrawn on 28 November 2024.