Originally Posted by Jumbodriver

Strongly suspecting wishful thinking by a competitor here.

Moving BA out would mean moving AA, CX, AY and QF (assuming JL and IB are moving to T5 anyway). BAA would be being very courageous (to borrow from Yes Prime minister) to do this. Unless, Heathrow East space is available instead. T4 is a non starter, the runway crossing plays havoc with the schedule.