Okay, wait just a moment, please.
I don't think I'll accept it as relevant. I don't think we can jump to the conclusion that they won't be coming. We've been reaching out to them, so it's a bit premature to say they won't be coming.
You could always give notice now and move it if we get a sign that they're not co-operating, but I'll rule that notice is required because it's not really related to what we're doing here. However, you can give notice now for the future.