At half-distance, Jones still led comfortably, with Regazzoni still second and well clear of Arnoux, and Laffite moving ahead of the Ferraris into fourth. Then, approaching Woodcote at the end of lap 39, Jones's engine failed, a water pump problem causing it to overheat. Six laps later, Laffite also retired with engine trouble. This left only four drivers on the lead lap - Regazzoni, Arnoux, Scheckter and Villeneuve - with Jean-Pierre Jarier up to fifth in his Tyrrell and Watson sixth.