Turf Fen Windpump (near How Hill) Norfolk, England.

Grade 11 (2) listed building, built has a drainage water pump c.1880, not for milling.
Note: The Norfolk Windmills Trust is actually officially registered "The Norfolk Mills & Pumps Trust", !.
British Listed Buildings list separately some Windmills and Windpumps. (http://www.britishlistedbuildings.co.uk). Also, go to "Flickr" (click-on website listed with my Profile) for my picture of Thurne Dyke Windpump, Norfolk, England. - Another Windpump is at Horsey in Norfolk, England. For information on this go to "The National Trust" webpage (www.nationaltrust.org.uk) and in their searchbox type Horsey Windpump (don't type Windmill) then click. (Milling: the process of grinding, cutting, pressing or crushing in a Mill). - A millwright may also have been requested to do repairs in this wind drainage pump but it would not have included re-groving or replacing a grain-millstone because there would not be one, the water windpump not having been built for milling. So, he/she would be, when in the building, "a pumpwright",!.
So, when is a windmill not a mill, -when it could have been built just has a drainage water pump wind-powered.