Originally Posted by The Ginge

Waterside is essentially a collection of separate buildings joined down the middle by a street which is fully undercover, you can see it running down the middle on Google Earth. BA could effectively move in to half of the building and lease the rest to other companies, this may be cheaper than leaving completely and finding somewhere new. They would obviously have to share the car park, cafes and the street area with other people but then that's the case in the outside world anyway.