British Rail Class 421

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British Rail Class 421
Class 421/7 no. 1498 "Farringford" at Lymington Pier on 26 May 2005. This unit has been restored to 1960s-era British Railways green livery for use on the Lymington Branch Line.
In service1964 - 2005
ManufacturerBREL York
Number built166
Formationdriving trailer + trailer + power car + driving trailer
Operator(s)British Rail, South West Trains
Car length265ft 8 1/2in
Widthft 9 in (2.81m)
Height12ft 9 1/4in (3.89m)
Maximum speed90mph (145 km/h)
Weight150 Tons
Power output4 x 250 hp traction motors
total 1,000 hp (746 kW)
Electric system(s)750V dc third rail
Track gaugestandard gauge
Class 421/3, no. 1717, at Clapham Junction on 20 August 2004. This was one of the final few 'Phase 1' 4Cig units in service with Southern.
Class 421/5, no. 1313, at London Waterloo on 19 July 2003. This is one of 22 "Greyhound" units that were operated by South West Trains. This unit has since been withdrawn and scrapped.

The British Rail Class 421 (or 4Cig) electrical multiple units were built at BR York Works from 1964-1972. Units were built in two batches, and were initially introduced on services on the Brighton Main Line. Later units were introduced on services to Portsmouth. These units replaced older Southern Railway-designed units, such as the 5Bel "Brighton Belle" units, and 4Cor units. These trains were known commonly as "slam-doors".