British Rail Class 88
The British Rail Class 88 is a type of mainline mixed traffic electro-diesel locomotive manufactured by Stadler Rail for Direct Rail Services (DRS) in the United Kingdom. The locomotive is part of the Stadler Euro Dual family. It is the first dual-mode locomotive in the UK to use the 25 kV AC electrification.
The Class 88 is part of the Stadler Euro Dual family. This is a range of dual-mode locomotives that are fitted both with a pantograph, to collect electricity from overhead wires, and a Caterpillar diesel engine. The UK version is able to run either on electrified lines using the pantograph, which is the UK's standard OHLE current at 25 kV AC, or away from electrified lines with the Caterpillar C27 950 hp (710 kW) engine.
DRS has procured the Class 88 to serve as a mixed-traffic locomotive, capable of operating both passenger and freight services. Primarily, the type has been used by DRS to haul freight using electric locomotives without the need to hire in electric traction from other operators. As with the Class 68, they are also capable of operating passenger trains.
https://en.wikipedia.org/wiki/British_Rail_Class_88