Oh dear, my memory isn't what I remembered it to be! I've found my old log book & for some reason I haven't entered the 3 flights I did on the 47. However I did enter the 1179 check I did on Bell 206 g-awol on 31/8/77, the signing off signature looks like K. Kendall, not too sure of the initial. The office/hangar was just to the north of Perth, fairly well surrounded by businesses who complained at the noise sufficiently to have them move on. I believe the company was owned by a wealthy car dealer who I don't think I met. I've no idea where they moved to but I think they picked up a small offshore contract.
So it wasn't Kestrel but was it Kendall Helicopters, not to be confused with Dennis?
Looking back many pages I see G-AWOL was owned by Terry Drury(?) Racing, he must be the car dealer I was told about.