On the other hand, these people aren't your run-of-the-mill solicitors. Every judgment they have made in the last twenty years will have been watertight. I doubt they are sweating over consequences or taking longer than they would normally.
Imho it's taking longer than everyone thought it would either because it was always going to take this long and no-one had any idea what they were talking about, or something is going on behind the scenes to delay it.
My mind on that, as always, is open. But not at all concerned.