The Hitachi factory in Newton Aycliffe is at the forefront of green technology as new battery-powered train trails are set to start next year.
Engineers at the North East factory are working on replacing a diesel train engine with a battery pack to power an Hitachi train across the Pennines using electricity.
The trials are expected to start in the spring and will mark a key moment for the Newton Aycliffe plant as Hitachi continues its push towards green energy.
Source: The Northern Echo