East-end vs posh person accent

“...if that’s the east end of london accent, then what’s a posh person’s accent? ’Ehrts kurhn, uhrmpuhn durhn sanhn. Bingdy hwing, hwehng. Erna cuppinumberr,’ said a posh person to me today. He also said, ’Kyuhnngg endishtuhn empiwichweng...’ ...And I believe him!“