I know nothing about it, but it certainly is interesting looking.
Hope you get the info needed because I sure would love to see a model of it.

Roger I have the following info on the vehicle. There was a long wheel base model as well but at the moment I have no info on it.

Short Wheel Base tipper.

Ford V8 85bhp. 4 forward 1 reverse gear.
WB - 9foot 10 inches.
length - 15foot over all
width - 7foot 1inch
hight - 6foot 11.5 inches

2 ton, 9cwt rated.

RAF Tructor 4 X2

Ford V8 85bhp. 4 forward, 1 reverse, 2 speed transfer.
WB - 8foot 3 inches
tyres - 34 X 7

these were conversions of the standard truck.
Main Mods
Shortened frame (WB)
Warford 2 speed aux gearbox.
vaccum trailer brakes
RAF drawbar gear.

thats all I have apart from two poor photos of each in a book.

Hope it helps
Cheers
Cliff