While the GLA pull-out is still a rumour only, do you anticipate changes in the pipeline to say BHD and EDI services?? Belfast has really no other option to connect at a hub, EI has only a BA codeshare to LHR, and Continental to EWR I guess. Other than that its pretty much low cost at both BHD and BFS.
EDI / GLA and many of the other mainland airports will still have a Star or Oneworld presence, should bmi decide to pull.