More tea vicar

Google throws up www.sillyjokes.co.uk/ fart_machine/fart_slang.html
is response to "more tea vicar" suggesting that the phrase did originate a faux polite response to a public fart. (though I can't find the phrase on the page).

If I had to choose, "let Polly out of jail" would be my favorite.

Oliver Cromwell might have said "Who farted".

Hmmm. I don't think that has the same je ne sais quoi as "let Polly out of jail."

Ah, but Oliver was the plain speaking man of his times.

My favourite "fart coverup" is "Who stepped on the duck"!

oliver probably said, "Who fard dat shot"?