Hi Grantley
Here is a page with two examples, one male and one female. By way of background, it is a rural village whose main work was farming at this time as well as a declining textile (wool) industry. There were five people altogether with this abbreviation against their names, three male and two female, with ages ranging from 25 to 50. Unfortunately, none of them appeared in the 1851 census, so it is not possible to get more information on their occupations from that source. Any clues very welcome!
Ron