"To my ears, 'gone' has a longer vowel sound than ... to rhyme with 'stone'. I've never heard it pronounced scoon."
"I seem to remember that "scoon" is the proper pronunciation of the Scottish place-name "Scone". The bun is "scon" for me now, but the "stone" version was what I heard as a child."
From some time in the 1950s:
How to Get On in Society
John Betjeman
Phone for the fish-knives, Norman
As Cook is a little unnerved;
You kiddies have crumpled the serviettes
And I must have things daintily served.
Are the requisites all in the toilet?
The frills round the cutlets can wait
Till the girl has replenished the cruets
And switched on the logs in the grate.
It's ever so close in the lounge, dear,
But the vestibule's comfy for tea
And Howard is out riding on horseback
So do come and take some with me.
Now here is a fork for your pastries
And do use the couch for your feet;
I know what I wanted to ask you
Is trifle sufficient for sweet?
Milk and then just as it comes dear?
I'm afraid the preserve's full of stones;
Beg pardon, I'm soiling the doileys
With afternoon tea-cakes and scones.