But honestly, the most likely scenario that fits the wreckage trail and aforementioned witness accounts is the Somatogravic Illusion. Look here
https://www.atsb.gov.au/media/5226668/199003089.pdf
Impact at 183kts and a 150m wreckage trail shortly after takeoff. Uncanny resemblance.
More known for dark moonless nights, but equally well can occur in fog.
Admittedly the PIC was by reports experienced and less likely to fall into this trap
My thoughts exactly. And having read the accident report from the 2000 Blackbushe crash, I suspect that was the prime cause as well.
Somatogravic alone in an experienced pilot, even in fog unlikely (but not impossible), I think most would agree.
I have been studying the somatogravic illusion in some detail for a while now and one thing that is obvious is that it is no respecter of experience. Of some 180 crashes I have details of, the experience range is from 100 hours to 27,000 with the average being around 6000.