Some people might think Claire is posh with posh references...
I learned a lesson once. (one that I actually listened to)
There are the posh, and the not so posh. One is gained status through heritage of birthright 'Lady Wonk deTilly d'ava-big-land' whom might be labelled as posh, but in reality, quite usual, apart from maybe quirky out fits and mis-matched stockings. Then there are the people whom aspire to these Camillas. Women and men whom believe they have to have this lingo as part of their vocab (just add a 'Y' at the end of everything) Scrummy, Mummy, Yummy, Chummy, and training their voices into 'speaking clock' mode.
Although I cannot comment on Claire, there are A LOT of people in life whom enjoy creating their own fake status. (Hyacinth Bucket types) People whom are to frightened to be themselves, or, if they
are themselves, they dont feel very significant or important.
I would guess that if I did spend a weekend as Claires guest at her home, or her 'New England style mansion dahhlin', it would be very usual and she would make a great host, even though she might be fed up reading my night shirt, with its logo 'free pussy here' over breakfast