By Nick Carey LONDON (Reuters) – A consortium including Hydrogen truck startup HVS and supermarket chain Asda said on Wednesday it had been awarded a 6.6 million pound ($8.1 million) UK government grant to develop autonomous hydrogen heavy goods vehicles. The project is one of seven backed by Britain’s Centre for Connected and Autonomous Vehicles (CCAV) to showcase the potential of self-driving vehicle technology and must demonstrate a sustainable commercial service by 2025. Glasgow-based Hydrogen Vehicle Systems (HVS) leads the “Hub2Hub” consortium that will produce two prototype self-driving…