British Rail Class 423

British Rail Class 423
Class 423/1, no. 3445 at Waterloo East on 8 February 2003, with a service to Charing Cross. This unit is painted in Connex livery.
In service	1967-2005
Manufacturer	BREL York
Number built	194 units
Formation	4 car per trainset
Operator(s)	South West Trains Southern South Eastern
Specifications
Car length	66 ft 7 in
Width	9ft 3in (2.81m)
Height	12ft 9 1/4in (3.89m)
Maximum speed	90mph (145 km/h)
Weight	Total - 36F/266S
Power output	1,000hp (740kW)
Electric system(s)	750V dc third rail

Class 423/1, no. 3810 arriving at London Waterloo on 15 August 2003. This unit was one of the last to carry Network SouthEast livery. It was nicknamed the "Great Escape" after it was exported to Germany for a while for testing.

The British Rail Class 423 (or 4Vep ) electrical multiple units were built by BR at York Works from 1967 to 1974, although the MBSOs and TSOs of the first 20, 7701-7720, were constructed at Derby Works. They feature manually opening doors next to every seating row. They were mostly found working outer suburban services in South London, and rural services in Kent and Sussex, up to 2005 when they were finally replaced by Electrostar and Desiro units.