When I did one year of Drama at Glasgow Uni, I attended voluntary Voice classes.
We thought that we would be taught how to project our voices. Oh, no...The wee Welsh wumman in charge wanted us to speak RP.
At school, I'd been accused of being "posh", so I wasn't too worried.
The WWW handed me a recipe to read and then told me to read it in my 'best accent'.
I read. She fell silent. Then: "Weah you trying to read that prohpehly?"
I was made to practise: "He whoooo woooooould know aaaaaught of aaaaaaaht must leaaaaaahn to take his eeease."
My mum was delighted when I came home speaking like that. It last until the day I answered the phone: "Caaaaowdenbeeeeath five one twoooo, seven ooooooh fooooah."
My Aunty Peggy was at the other end: "My Weary, that's fwiiiiiiiiiightfully posh!"