Ron, there was another accident at Cottesmore with my skipper. We knew nothing of it until the following morning when we overheard the words "runway marker board" and "hit".
We interrogated the driver who 'fessed up. We were relieved to find that it was while he was flying as IRE with another crew. The copilot was doing a roller at night and had clipped a marker board with the port wing.
Now we know where the boards are sited, we know how high they are, and the impact was 10 feet in from the tip. figure how close that was to the ground!
I am pleased to say the copilot was employed elsewhere after that tour.