[Ichthypresbyter]

>Posh = not from round here.

Perhaps the best example of that is that, as one of the linked maps [0] says, both British people who rhyme "scone" with "gone" and those who rhyme it with "alone" think that the other pronunciation is the "posh" one.

[0]https://starkeycomics.com/2024/05/10/eight-british-and-irish...