I think his arrogance thought the carcrash interview was enough.... i.e. I've made my position clear and that draws a line under it, type of thought process.
Yes, @Roussette, I agree.
I was ranting at talking to DP about this again today, specifically about how Andrew acted in and around that interview like he was instructing staff to believe him, to take his word for it, do his bidding and shut the fuck up because I am the Duke.
It's as if the public, as subjects of his mother, are also his staff.