Raising head slightly above parapet!
I have had some dealings with procuring helicopters for the MOD, you ask the relevant service what they want, they pull out a copy of Janes and say "I want that one". A full tech spec is written and given to the DECships. They look at it as if it's just yacked on the carpet, throw it away and buy the next aircraft on Wastelands production line for 5 times the price of its rival and 3 times its original Wasteland estimate.
Interesting point about the AH the Israeli name is Pehen (Cobra). I wonder if some fella got confused with that and the AH-1 and just ordered the wrong aircraft.
The only reason for fitting an RR engine and Bitish avionics in the WAH was to placate the local lobbyists.