The solar and backup hydrogen fuel cell welfare cabins have been developed by Luton-based AJC Trailers and supplied by hirer GAP.

Sixteen Ecosmart ZERO cabins have saved 112 tonnes of carbon over 21 weeks avoiding burning 40,000 litres of diesel fuel in standard generators.

The unit is near silent, and emits only pure water vapour.

The cabins, which were first tested by Morgan Sindall at Heathrow, provide a kitchen, seating area, separate toilet and changing room for workers.

HS2’s Environment Director Peter Miller said: “With over 250 active work sites between London and Birmingham, we have a huge opportunity to roll out British-made products such as this solar powered cabin, to dramatically reduce the project’s carbon footprint, bringing environmental benefits to local communities as we build the railway.”

Lee Davies, board member at Costain Skanska joint venture said: “Working closely with our supply chain, we have identified many ways to maximise our environmental outcomes, leading to several thousand tonnes of carbon dioxide equivalent (CO2e) saved to date.

“We have focused on identifying innovations and efficiencies throughout our whole programme, from our power supplies and fuel sources through to working methodology by reducing and recycling materials.

“Adopting these solar and hydrogen powered cabins will help us deliver our target of reducing our carbon footprint by 50%.”