BOAC makes an intersting point. I always (as a joke) put up the cry of "QANTAS number 1" when it comes in when I'm on. And I am alway treated with the appropriate response (which can't be mentioned in this PG time slot!)
But I would like to see at Heathrow the guys try and sequence Blighty carriers ahead of ANYBODY else on a regular basis. Our wake vortex order on final often is the major determining factor of the sequence, and this may mean bringing stuff off the holds a little ahead of others already there, but it usually is only by 1 minute or two. And I always give and explanation.