18. A traffic sign of the size, colour and type shown in diagram 770 in the Regulations shall be provided on the left hand side of each road approach to the crossing facing traffic approaching the crossing. Below this a traffic sign of the size, colour and type shown in diagram 773 in the Regulations shall be provided facing traffic approaching the crossing. This combination of signs shall also be provided on the left hand side of the adjacent minor road (Glenstall Road) facing the traffic approaching the give way lines at the road junction.