New to the highly interesting Q&A thread, too (THANKS!), and since I simply can't spend hours and hours going through the whole thing: Did Ed ever say, concretely, what the "grossly insulting, patronising, bewildering and deeply hurtful" thing was that Mark seems to have said to him in their last professional meeting?
It must have been quite something, given that Mark even wrote a song about the incident (Let's See You)
I don't quite understand why Ed -- who doesn't exactly seem to have a problem with being frank -- would refuse to spell this out.