Thanks guys. I still don't really know how it happened. Came round into Cedar Road from Witkoppen from Randburg side, robot at that intersection had just changed,wanted to beat the traffic and get across to the right hand lane,accelerated,I couldn't correct in time,spun,went backwards over the kerb and down the bank and into the fence. I don't have a scratch on me. No airbag deployment,car started fine,but the rear left was hanging over the rocks so couldn't get drive at all.
Managed to extract the car from the fence, some brilliant manoeuvring by the flatbed driver. I've not had a chance to see the extent of the damage. I'm going to go to Lyndhurst ARC a bit later today, whether they like it or not.