I wouldnt be surprised if BA cut the DUB-LGW route in favour for a codeshare with EI. I know BA carry a fair amount of pax ex DUB-LGW-MCO, but with EI's new MCO service, numbers may drop off. Also, the fact that EI are offering low fares, and FR, as always is offering rock-bottom fares, theres not much room for BA. The 737's used for the route could probably be allocated to ex GT/Bmed routes, or new North African/Eastern Europe routes where they can make more money