Battery electrified power is predicted to become the dominant mode of propulsion in future passenger cars. For long haul heavy duty transport challenges remain around practical range, payload and total cost. Currently there is no single economically viable decarbonised solution for heavy duty ground vehicles. Ammonia could form part of the ideal future mix, as a hydrogen energy vector or potentially through direct end use. The proposed work seeks to determine the energy and air quality impacts and potential future applications of a novel ammonia-fuelled heavy duty IC engine operating with high efficiency (c.50% brake) and zero emissions through a new fast burning combustion system. The project will evaluate potential reductions in energy demand in the 'green' ammonia production process, making use of the new green ammonia pilot plant at the Rutherford Appleton Laboratories. In order to assess relative advantages and challenges, the project will undertake evidence based life cycle analysis across a spectrum of competing decarbonised powertrain technologies for long range heavy duty transport (ground, freight rail and marine).