The British Rail Class 507 was built by British Rail Engineering Limited at Holgate Road carriage works in two batches from 1978 to 1980. They are a variant of British Rail's standard 1972 design for suburban EMUs derived from PEP stock, which eventually encompassed 755 vehicles over five classes (313, 314, 315, 507 and 508). They have worked on the Merseyrail network from new.

In March 2024, the Class 507 Preservation Society reached an agreement to preserve 507001 after the chairman of the society bought the unit for £1 from Angel Trains.