FYI the commitment for Pier 6 was given before 09/11/03 - the reason why the development was halted after Osama's atrocities. BA never re-entered the agreements but because so much of the prefabricated structure was already manufactured, the BAA decided to press on during 2005.
None of the stands or gates at Pier 6 are exclusive to BA. The computer systems are on BAA's "CUTE" multi-user gateway and it is not unusual to see "First Choice", "Etihad" or "Astraeus" on a stand previously occupied by a BA aircraft.
We will wait and see what the announcement is on 1st March - one thing is for certain, it is unlikely to be good news for the Gatwick based BA staff!