CaptJ,
One thing to threateN to move another to do it.
Why would they move ,already proved that US airlines for example don't want LGW as they have all fled to LHR driven by the fact Business passengers want to fly from LHR and not commute to LGW..
Long Haul, LGW is mostly used for leisure routes and by airlines that can't get slots into LHR.
Would an alliance risk loosing front end business passengers to other alliances still using t LHR by moving to LGW.they wouldn't get many back.
Nigel