A utility vehicle was instructed by the surface movement controller to hold at taxiway A4 holding point which is clear of runway 01. At the same time an A300 was landing on runway 01 and was expected to exit the runway via taxiway A4S, a high-speed exit. However, the aircraft continued past this exit, and as it became obvious that it would now exit at taxiway A4 where the vehicle was stopped, the vehicle driver was instructed to vacate the taxiway. The driver reacted by driving across the runway, passing beneath the wing of the aircraft as it entered the taxiway. The driver misunderstood the instruction and was under the impression that he was cleared to cross the runway. The company has undertaken to re-brief all drivers with reference to clearance requirements.
