At last a result worthy of pprune.
I too worked for the same airline as 'groundbunnie', albeit on the other side of the airside divide, I oversaw recovery of one from the grass, then had to work on another that happened the same evening.
Whats' not been mentioned is how many similar reports at the time were put through the company ASR scheme,and did they make it to the investigators?
IIRC, the airport management were relying on Mu-meter readings,
being set against what subsequently turned out to be out of date information,by 'ranger one's department.
ttfn