Cazatou (K52)
Just to help us understand the accuracy of your 'back of a fag packet' assumptions with which we are supposed to be able to satisfy the required standard of proof (Absolutely no doubt WHATSOEVER - if you recall!)
Would you please:
1) Define precisely what you mean by: "ATC fix on leaving the Aldergrove CTZ"
How accurate was this so called "fix"? What was the evidence exactly?
2) Even if your estimate of "average groundspeed" is vaguely accurate, in order to increase the credibility of you position, shouldn't you be giving us your 'best guess' at the aircraft's air speed for that period?
For example, what if a significant tail wind existed over the vast majority of the aircraft's VFR routing? Wouldn't that result in a high average 'groundspeed', when in fact the aircraft could have been cruising well within normal airspeeds?