IME the hallmark of a really posh person is their unapologetic imposition of their terrible halitosis on you.
Common people worry about bad breath; posh people don't give a shit if their breath smells like shit. They just talk at you while you wilt like the cat in Pepe Le Pew.
I look at the Queen Mother, Prince Philip, the Queen, Charles, Anne and Andrew and know they would knock me back at 20 paces.
Margaret (God rot her soul) and Camilla would stink of fags and whisky as well as decaying food matter trapped in their teeth. He's several rungs down, but I've met Nigel Farage and he's the same.
They probably didn't know what hit them when Diana moved in with her dental floss and insistence that her sons had braces and brushed twice a day.
God knows what they make of Kate, whose teeth are a triumph of middle class private orthodontistry and Meghan and her coconut oil rinses.
I feel the same thing when I look at that Cholmondeley chap.
No wonder his wife was attracted to William. At least Diana taught him to floss.