Wot? BA hasn't ever had priority at LHR?
There was always the case of the BAC 1-11 (VY?) which always got priority after it was left pointing towards Boscombe Down one day and forgotten while on vectors for 09L/R (in my day).
If anyone has the tale which was posted here a few years ago in an audio file, please repost. It might lighten up the thread and make the retard laugh.