|Number built:||48 (24 2-car sets)|
|Engine:||2 GEC507-20J traction motors (750v DC third rail)|
|Power:||500 hp (370 kW)|
|Formation:||Driving Motor Standard Open (DMSO)+Driving Trailer Standard Open (DTSO)|
The Class 456 share the same front end design as the Classes 320 and 321 though with nose mounted control and air connections for multiple use with 455s. They were introduced into the Southern division of NSE and eventually settled down after a period of technical and reliability problems.
The Class 456s were delivered in Network South East livery . Following privatisation they were operated by Connex South Central later Southern. In 2014 the fleet transferred to South West Trains to strengthen London commuter services.
|SWT 456 012 at Guildford|
|Coupled up to a Class 455 (left) - notice the different profiles|
|Another view of 456 012 at Guildford|
|456 012 arrives at Guildford with a 455|
 Colin J Marsden, DMU and EMU Recognition Guide (Ian Allan, 2013) p. 354
 Bruce Oliver, Southern EMUs Before Privatisation (Ian Allan, 2010) p. 95