Transport For London is working towards the Greater London Authority's target to reduce CO2 emissions by 25% before 2025 and to help them achieve this target they have installed the UK's largest in-house hydrogen fuel cell in their new building. This could also help them save upto £90,000 per annum on utility bills. This has been described as a major green retrofit.

Kit Malthouse, deputy mayor of London and chairman of the London Hydrogen Partnership, said: "Zero-polluting hydrogen fuel has the potential to radically transform the way we power our city to create a more pleasant environment. This isn't a fuel of the future but is available right now."