This commitment is part of broader aims to make the project net-zero carbon from 2035, with targets of diesel-free construction sites and major reductions in carbon emissions from the steel and concrete used to build the railway.

HS2 minister Andrew Stephenson said the decision would help the government fulfil its climate ambitions including a greener transport network.

The first diesel-free construction sites are expected sometime this year, while carbon emissions from the steel and concrete used in the project will be reduced by 50 per cent by 2030 compared with 2021 levels.

To help achieve this, HS2 is collaborating with research organisations to accelerate innovation in low-carbon technologies such as alternative fuels and renewable energy.

A major trade union criticised the government last week for failing to ensure that HS2 was using steel made in the UK.

Mark Thurston, HS2 CEO said: “HS2 Ltd is completely committed to reducing our carbon emissions...

Robert Heaton