Your issue is one I’m looking into heavily, not just because I have a similar one but also because there are some others who seem to be going through the same, specially after the latest official update.
What’s really baffling me is this: Those who are having similar issue are having it because of a bunch of specific third party payware airport and scenery addons, and then there is a small number of people who are having it because of some freeware community addons.
But in your case, according to what you said and confirmed, it’s happening with the default, Asobo-handcrafted EGLL, which came with the Premium Deluxe edition of MSFS. Just for reference:
So I have a request, since you seem to be willing to experiment: do you think you wanna remove the Asobo-handcrafted EGLL via Content Manager and try spawning at the airport again and see if you still get a CTD? (You can redownload it again at a later time if you want to.)
If you remove/uninstall it and do not get a CTD any longer, then we might get a clue as to what’s happening.