Bit of a dilemma for competition authorities. To the Mandarins in Brussels they are looking at effects on the EU market. Not at all interested in the EFTA or third countries. While the U.K. is not yet one of these, they would be by the time any investigation is concluded.
OTOH the British authorities are charged with reviewing the activities of British companies, something IAG is not.
Well, perhaps the Norwegians will look at it.