|Number built:||508 (127 4-car sets)|
|Motor:||4 1TB2016 0GB02 three-phase traction motors (750V DC third rail)|
|Power:||2, 682 hp (2, 000 kW)|
|Formation:||Driving Motor Standard Open (DMSO)+Trailer Composite Open
(TCO)+Trailer Standard Open (TSO)+
Driving Motor Standard Open (DMSO)
The original fleet is known as the Class 450/0 and can carry two hundred and forty two standard class and twenty four first class passengers, first and some standard class seating is 2+2 with other standard class seating being 2+3.
Twenty eight sets were modified for higher capacity (facilitated by removing first class seats and altering the internal layout) for the Waterloo-Windsor route  in 2008-9 as Class 450/5. First class seating was restored to these units as they were replaced by Class 458/5s on the route from 2013 and the 450/5s rejoined the main fleet.
Originally SWT were to receive a mixed fleet of 450/0s and 450/2s which were to be 5-car sets for inner suburban routes however the idea was dropped due to problems with platform lengths. All sets remain in service with South West Trains' successor South Western Railway who took over in the late Summer of 2017 .
|SWR 450 104 and 560 at Haselmere|
|SWT 450 027 at Ash|
|SWT 450 011 at Portsmouth Harbour|
|SWR 450 548 at Virginia Water|
|SWR 450 558 at Ash Vale|
|SWR 450 094 at Guildford|
 John Balmforth, South West Trains (Ian Allan, 2011) p. 62
 Colin J Marsden, DMU and EMU Recognition Guide (Ian Allan, 2013) p. 349
 Modern Railways (May 2017) p. 24