I lived in the UK and London for almost 10 years. What shocked me was their rigid class system. I was never aware of a class system until I went there.
This is why some British non-aristocrats learn Received Pronunciation...to disguise their lower class origins.
Yanks do it too...only it is called other things;...Standard Broadcast English, Transatlantic, Accent Reduction, among other names.
I myself did it to conceal my Lower Class origins...I don't remotely sound "Texan"...