Two policemen, a Sergeant and a Constable would turn up at the School and lay a pretend road in the back playground. This was made of two old white-painted firehoses for the kerb edges. They would also have mock Traffic Lights, Belisha Beacons and a roll-out Zebra Crossing.
We would come out of School and stand along the “Kerb edges”
The policemen were always referred to as Uncle Pete, Bill or whatever.
Both a Patrol Car and a Bike would race round the playground at high speed, skidding to a halt as either a plastic ball or a cardboard cut-out of a child was thrown in front of them.
After the demonstration we all had to sing the Road Safety Song. This was done two or three times as we would add Cha-Cha-Cha at the end which led to repeats, presumably for emphasis.
The long skid marks were viewed with awe for weeks afterwards.
Today’s Health and Safety Regulations would mean we would not have been so close to potential catastrophe.