There is no consipiracy about who can operate from what airport. EK chose GLA over EDI having looked at both airports. It is not illegal for them to pick that airport and would be illegal if there was an agreement to limit competition. As for Qatar and Etihad, I would suggest that they are monitoring the commercial prospects for commencing EDI but as there doesn't appear to be a case for them to do so at the moment, they are not going to start operating; in any case, i believe that any further UK expansion from them would be from BHX given the larger catchment area and the make-up of the catchment lending itself to the network both airlines operate.