Ah, this again...you posted this lot on the Flyer forums some time ago.
In brief, as it isn't really for me to explain such matters fully, the type of testing being undertaken on that particular Hercules, on that particular day, precluded it from being parked tail into the engine running bay berm.
It was a highly unusual aircraft running a very particular test, taking advantage of the conditions prevalent on that day.
Your experience was atypical of normal operations at Cambridge, and isn't the norm. I believe you (quite rightly) pursued the issue with Ops at the time. If you felt very strongly about the issue, then there are suitable procedures to raise a flight safety case with the CAA.
It sounds as though you learned many good lessons from this experience, as I am sure the operators of the airfield did too.
NB That photo must have been taken in the region of Sept 2008, if I remember rightly.
This was the side you couldn't see....
