I know it's not booktube, but Cinzia Has NOTHING on Jessica Kellgren-Fozard
That's the ultimate fake accent. It reminds me of "watch with mother" (showing my age there lol)
Though got to disagree with the accusation either of them are fake (both of them have had other people in their videos - I can't imagine other people would be ok if their friend or partner (in the case of Jessica) put on an entirely different accent).
I've gone back and watched their old videos just now out of curiosity and, as a working-class girl, Cinzia never sounded CLOSE to working-class
If you think that's working class, you're extremely middle-class it's painful