British Rail Class 455

The British Rail Class 455 are Mark 3 based electric multiple unit passenger trains built by British Rail Engineering Limited between 1982 and 1985. On introduction they replaced Class 508 units and ageing Southern Railway slam-door stock on commuter services out of London Waterloo. They were built from three batches of four cars, using recycled DC traction equipment from 1940s Southern Railway 4Sub stock, and were fitted with GEC Traction camshaft control. As they were designed for inner suburban services they have no first class seating, air conditioning or toilets and are limited to 75 mph. South West Trains refitted its units with AC traction equipment in 2017. The units were last operated by Southern in May 2022 and by South Western Railway in March 2026, and were replaced by the Class 701.