Sort of a "meta" question about these announcements.

I assume they already talk about them privately beforehand. Carney first made a speech seeking some kind of enhanced status within the EU. Then von der Leyen said basically "Yeah we'd love that". Now Carney says "Great, let's do it."

It would be embarrassing if Carney's first speech had instead been met with silence.

So how many steps ahead do they choreograph these announcements? Did Carney show a draft of his speech today to people in the EU last week? "This is where I'd like us to be at next week. What do you guys think?"

Anyone who's worked in international diplomacy or UN-type institutions that would know this? I'm just interested in the mechanics of such an announcement.