Whilst there is lower round-trip efficiency compared to electrification, hydrogen vehicles have the advantage of shorter refuelling times and longer ranges. This therefore makes hydrogen a potentially viable alternative to electrification for HGVs, but widespread adoption of hydrogen in HGVs can only be achieved with an The role of hydrogen in achieving Net Zero 73 assurance that hydrogen will be widely available across the country. Whilst other countries have given commitments to hydrogen refuelling stations, the UK has been more reticent to date. More trials for heavy goods vehicles, beyond those already announced and forthcoming as part of the Zero Emission Road Freight demonstration programme, need to take place in the next five years to ensure that a firm decision can be made on the role of hydrogen in HGVs in time to develop the infrastructure needed to deliver carbon emission reductions. Trials could be localised to minimise the initial infrastructure requirements. Any early adoption of hydrogen HGVs is likely to require subsidy by the Government to overcome the higher cost for the operators.