that's too advanced for me, im sorry. i dont have the ear literacy for that or the socio-cultural fundamentals. i could answer on a quiz that i would place what i heard as more likely to be in mary poppins then downton abbey sure. but i wouldnt even feel confident that was correct.
and if someone were to say: gil, can you define your understanding of the word 'posh' in general
i would say: posh means you have a horse, maybe several, and you went away to school as a little kid