Judge for yourself as you look at 15-year-old Geoff Lacey racing down its rickety surface, right. The steep track on the playground off Marlborough Road in South Oxford had been built by youngsters using old planks and poles. They had then built their own carts, using wheels from old prams. Geoff Lacey, 15, flies down the rickety cart track As you can see, it made an exciting if somewhat hazardous journey from top to bottom. County council officers were happy for the track to stay - in 1975, health and safety rules were not quite as rigid as they are today. However, when a motorised go-kart arrived, they insisted it stay at ground level - an aerial descent was one step too far.