Should we have this one? It's not exactly Not Even Bothering With The Accents
and its far from Just a Stupid Accent
. It might be a sister trope to The Queen's Latin
, but I don't think it qualifies as a subtrope because it applies not only to historical cases, but modern and futuristic ones as well.
The two examples I can think of are
1: Star Trek
TNG, Captain Picard
2: Les MisÚrables
, just about every cast member. High class characters have posh accents, lower class characters have cockney ones.