Class 153
Appearance
The Class 153 is a single car Diesel mutliple unit converted from Class 155 two car Diesel Mutliple Units. The class 153 have a max speed of 75mph.

Operators
Transport for Wales Rail
Transport for Wales Rail has a fleet of 14 class 153 for use on Heart of Wales Line and South Wales Metro.
Scotrail
Network Rail
Network Rail have converted some class 153s into Visual Inspector Units.