Dr Geoff Lindsey does a very interesting experiment at the end of this 27 minute video. The results really interested me — What if Gary Stevenson and Jimmy the Giant spoke British Received Pronunciation? :

YouTubers Gary Stevenson and Jimmy the Giant say their working-class accents make it harder for some people to take them seriously. In this video I look at accents and class, why “RP” causes so much confusion, and I explore their claim by giving them AI-generated “middle-class” voices. What effect, if any, does this have on how you perceive them?