Class 508: 43 4-car class 508/0 sets entered service from December 1979, initially on the Southern Region South Western section. With new class 455 deliveries, they moved to Merseyside, as originally intended, for the Northern Line from early 1982. However, this was without one of the TSO cars, which were incorporated into class 455/7 sets. They were renumbered class 508/1, and worked alongside and later interchangably with the 507 fleet. Twelve sets worked for Connex South Eastern and later South Eastern between 1996 and 2008 (508/2), and three briefly worked with Silverlink on the Euston - Watford Junction route (508/3).
This shot shot 508109 stabled at West Kirby.