To get back to the original thread, all official documentation still bears the name "A400M Loadmaster"
(Well, it did when I left the office yesterday at least)
What each Air Force decides to call it is up to them, but I really don't think it'll matter. I seriously doubt anyone on the line will call it a "Loadmaster" as it would get too confusing, so just like the C17 not regularly being called a "Globemaster", it'll just be called an A400!
As for it being cancelled, ask 2 questions;
1 - Where is A400 going to be based?
2 - Who's constituency is it in?
(for the "not-so-on-the-ball", here's the answers....)
1 - "Future Brize"!
2 - PM Cameron.