The Department for Energy Security and Net Zero (DESNZ) has published a summary of responses to its December 2023 call for evidence on non-road mobile machinery (NRMM) decarbonisation options. The responses highlighted the diversity of NRMM and their range of uses across the economy, as well as the likely need for multiple technologies, such as electric, hydrogen, and biofuel technologies, to facilitate NRMM decarbonisation. Respondents noted that low and zero carbon NRMM can be significantly more costly to purchase and operate compared to existing technologies, with the cost of installing recharging infrastructure also identified as a barrier to the deployment of decarbonisation options. In addition, certain regulations were identified as outdated or requiring further clarification. The government intends to use these responses, along with other evidence-gathering activities, to inform future policy development related to off-road machinery decarbonisation.