I learnt this morning (by a circuitous route, - don't ask!) that if you have a good vinyl copy of The Beatles, known as "The White Album" of 1968, and it has, as a few do, 'Rocky Raccoon' spelt with only one 'c' then it can inflate the price by "several hundred pounds", amazing.
Has anybody got one?
From the OED entry for 'yogurt', showing that
(a) the 'h' wasn't present in the original Turkish form ;
(b) it's likely that we acquired the 'h' from the German or Dutch forms of the word ; and
(c) the form without the 'h' is the preferred one for food packaging in this country:
http://www.upl.co/uploads/Yogurt1546882174.jpg
we seemed to acquire the word, and the product, about 50 years ago and the spelling varied because it was a comparatively new word on the supermarket shelves. But the nation seems to be settling on yogurt, which is pretty phonetic.