Due to a lack of any real information the operators have, in consultation with the HSSG, elected not to fly the Pumas until there is something to go on.
The AAIB may well already be sure, from the pilots' accounts, that this is a CFIT accident, but will not say for sure until they have the CVFDR. If they were to put something out to the effect of : " there is nothing wrong with the aircraft, this was pilot error" the operators may very well start flying again.
Imagine then retrieving the CVFDR data and realising that there was in fact something very wrong with the aircraft but the pilots hadn't noticed (for all the reasons alluded to earlier in this thread).
The AAIB would be in deep sh*t for jumping the gun.
...and isn't this the point? Given (as has been said) the pilots are known to many here and perhaps things have been said privately to them and the AAIB/Operators etc. What would be so terribly wrong by just saying the drivers think they dropped it but we will wait to do some further investigation to confirm there were no other circumstances?
If in fact that is the case