the vehicle has an electric drive system (36) which recovers braking energy, a fuel cell system providing electrical power to the drive system and a mechanism for direct use of recovered braking energy in at least one energy consuming component of the fuel cell system. A compressor (4) compresses oxygen contg. gas for the cells. The braking energy utilisation mechanism contains a flywheel in the compressor and/or a pressure reservoir (44) in the compressor outlet for additional oxygen contg. gas compressed using recovered braking energy
