You're not actually for real are you? I feel my chain being yanked now....
A six runway LHR demolishing swathes of Middlesex and Berkshire coupled with all the major airlines in Europe merging?
Nothing you have said yet is remotely likely!
Remember also that when you have deal with comeptition wise with London, you have to take account of the other airports in the area, in that respect, LH/IAG is not in any way monopolistic in that respect
Not related to the core subject matter, this is peripheral. Oh I give up, someone else have a go.....