I really can't be bothered to read beyond the first couple of posts by Mr. Retard (there's a clue there, isn't there?).
I've spent my entire airline career to date operating from LHR. so far that's 14 years with BMA/bmi and one year with BA. So for most of my career BA has been my (friendly) rival. Additionally, my fiancee of fourteen years is a London TMA controller with NATS.
I can categorically state that BA have never, in my opinion, received preferential treatment over me, or anybody else.