The death of Leslie Philips at the extremely ripe age of 98 had me thinking about his suave upper-class persona versus the fact that he came from a working-class East London background, as did other professionally posh actors + showbiz personalities of the same era such as Terry-Thomas and Frank Muir. The latter quipped that despite appearances "I was educated in E10, not Eton."  There are many other examples of artistes who did a kind of auto-Pygmalion job and taught themselves to speak proper. But this thing of performers adopting received pronunciation upon entry into the entertainment world is long gone. If anything, their modern equivalents would try to blunt any poshness in their speech patterns. There's this weird disjunction between a cultural ascendancy of the demotic, even as class divides and economic inequality are worsening and Eton rather than E10 continues to fill the cabinet.