Roger Williamson crashes hard on lap 8, roll his car and catches fire. Only yards away stood a fire tender, but no order was given to stop the race and its driver refused, perhaps rightly, to drive against the direction of the traffic. Worse, marshals with fire extinguishers merely watched as Purley fought a lone battle to right the upturned March. He could hear Williamson inside it. Roger pleaded with him to get him out. Time and again Purley tried to lift the car, but each time he failed. For two laps - at least 2m 47s -the fire was minimal, but then it grew dramatically in intensity. David tried to fight it after grabbing an extinguisher from one marshal, but by then the fire had too strong a hold.