In a significant step towards a greener rail industry, Colas Rail UK has recently conducted trials using hydrotreated vegetable oil (HVO) as an alternative to diesel fuel in their locomotives. This move aims to significantly reduce carbon emissions, with HVO offering a claimed 90 per cent reduction in comparison to traditional diesel fuel. They may not be the prime movers in the race to net-zero, but Colas is running with the throttle wide open to become a leader in the industry.