Bhd might have higher yield, or it might not, than Bfs. One thing is for sure now, it makes no matter to BA where they operate from out of Belfast. If they were to move to Bfs, there will be no competition stepping in to take over Bhd-Lhr. So now, for the first time in many years, they can make a decision on where to use here based on whatever deal they get. And if that is Bfs and you want to get to Lhr, then Bfs is where you will go. Sadly, Lhr is no longer the important route it once was out of Bfs, when in years gone past it carried in excess of 100k per month. Now Lgw carries more out of Belfast combined and when Bfs have up to 10 flights a day to Lgw when Fr start, that gap will get bigger.
TB