Tags: Train.
British Rail Class 503 trains were 70 mph (110 km/h) electric multiple units. They were introduced in two batches — in 1938 by the London Midland and Scottish Railway (LMS) with a further batch (built to a similar design) in 1956 by the then nationalised British Railways (BR). They were designed for and operated on the Wirral & Mersey lines from Liverpool to West Kirby New Brighton and Rock Ferry.
