Flyin Dutch,
After calling the CAA I would have called the MOD to see why it hadn't been intercepted and escorted away for daring to spoil the Sunday afternoon silence in our quaint little village.
Maybe a smiley after the reference to the CAA in the original post would have confirmed I meant that in Jest.
Reason I looked it up was to see what it was and where it was from and yes I might have been tempted to ring the owners and only after confirming that aircraft overflew this area numerous times at that particular time of the day would have explained the effect their flying has had on some of the local population, politely of course!
Anything wrong with that, if you don't tell people they don't know? We have enough trouble in this country with noise complaints and particularly with the airfield I fly from!
The whole point of this post was to try and get an estimate of the maximun height the aircraft would have been for the reg to be visible. If you don't have anything to contribute to the original question which I think was a valid question judging by the number of informed replies then don't post!