When the story first came out the Duke of Westminster’s office issued a statement (unusually - he’s not exactly a public figure). The statements was:
“We are not in a position to comment on the guest list.”
That’s obviously a “no comment” response. Interestingly though, it’s a no comment that focuses on the guest list - i.e. who is or is not invited.
If Harry had already been on the guest list and declined when he received a “Save the Date” notice, as he now claims, the Duke’s statement is a little odd. He would have been able to say that he is not in a position to comment on who is attending the wedding. But he didn’t - the statement is all about who is on the guest list.
He also could quite easily have contacted Harry and said “happy to clarify that you’ve already sent your apologies” - which he could have done, since they are apparently close. He clearly didn’t do that either.
As I said, interesting. I have heard it said that the art of crafting a “no comment” statement which doesn’t give too much away is one of the hardest things to do in PR. This one is perhaps an example of this!