They may have had bluer blood, but it's hard to imagine anyone having a posher voice than Athill's.
Ah hear people laughing at me, sort of posh voices.
Cameron had his extra posh plummy voice on, something he tends to do when he's stressed.
There were bags of skin under her neck, and she had a deep, posh, drawling voice, like an actress in an old film.
So you don't need to put your posh voice on this tape?
I lifted my head out of my magazine and heard a rather posh voice say 'Excuse me'.
Then a posh voice came out of the window: 'What's going on?'
There was one lady with a very posh voice, a doctor's widow, who had been in Jarrow at the time of that terrible hunger march.
Her posh voice had pierced the upper regions of George's office.
She strode through the sawdust, up to the bar, and spoke to the landlord in her poshest voice.