I watched a comedy bit once (that I now can't find) where it was talking about wanky pronunciations of places etc
Batterceya for battersea
claham instead of Clapham
St Ockwell
And they said what next?
Vauzall in stead of Vauxhall 😂
I had a posh friend who would play down shopping at the big shop in Knightsbridge (back in 80s) by calling it HA rods
What others do you know of??