Hitachi Rail maintains more than 200 trains at various depots in England, Wales and Scotland. It manufactures and maintains regional, intercity and high-speed trains that operate in the country.

Hitachi Rail Doncaster site

© Hitachi Rail

In 2020–21 Hitachi Rail reduced its carbon emissions by 30.5 percent. ScottishPower was the first UK integrated energy company that removed fossil fuels from its energy generation.
source= https://railway-news.com/hitachi-rail-signs-deal-with-scottishpower-for-100-renewable-electricity/