Blueskybird,
Good luck with your interview. One of the questions I was asked, regarding business issues, was what did I think the upcoming challenges BA face in the future. My reply was about the move to terminal five in March 2008 and the preparation for this. I also mentioned the deregulation of competition and what open skies would mean for the industry. Hope this might help a bit.
Another BIG tip- when you do the group exercise, take a mental note of the others names, you may be asked at a later stage what they were!!
IP