 One anomaly was that the "Sunflower" display in the cab of the Connex train was showing the all-black "clear" indication (meaning that the last signal which had been passed was displaying a green aspect).However the HSE report concluded that the Automatic Warning System (AWS) on both trains was probably working correctly, and that the shock of the collision had caused the electro-mechanical indicator to change.In any case, even if the AWS had given a wrong indication this would not have absolved the driver of the Connex train of his duty to observe and obey the signals.