Although I don't know the costs involved. I'm sure BA could potentially save £1000s changing airport.
negotiating a new contract at a better price
using larger aircraft aircraft to free up slots and aircraft
Maybe a 767 like they use in EDI for a morning, afternoon and evening service
As it's been said also 24/7 airport preventing them from having to pay fees for late arriving aircraft into BHD
There has been rumours of BA cityflyer coming to Belfast
LCY from BHD for all of the business pax who used it's LHR service
Relocating LHR for the reasons said above