"I am still haunted by those vowel sounds and those uniquely ungrammatical sentences"

Alice White has clearly not been trained in Received Pronunciation (RP), the formalised speech pattern more senior servants like Miss Kenton and Stevens would have adopted. There are no deviations from grammar and sentence structure in RP, as there might be in regional dialects, and it immediately identifies a speaker as having a particular upbringing or background.

The emphasis on RP faded in the 1970s, when the BBC began hiring presenters with regional accents.  Only 2% of British people now use Received Pronunciation, the other 98% speaking in a wide range of dialects, accents and idioms, reflecting the diversity of the British Isles.