Farmers have diversified in all sorts of ways to provide new streams of income for their farms. For dairy farmers, one option has been to process their milk on the farm to provide high value added products such as yoghurt, speciality cheeses or ice cream.
Troy Town Farm on St. Agnes in the Isles of Scilly is the most westerly farm in Britain. I think they have just nine cows, but they produce high quality ice cream. I can vouch for that as I have walked across St. Agnes to taste it.
This short video gives a brief account of their story: Troy Town Farm