Reg Cundick and Danny Howell in the book The Inns And Taverns Of Warminster, published in November 1987, stated:
The Nag’s Head, Market Place, Warminster
This inn was recorded by both Daniell and Halliday as being in existence in the early 1700s. It was listed in the 1801 Survey Of Warminster as Plot No. 305 at the Market Place. It also included a malthouse. At that time it was owned by the Longleat Estate, leased to George Lye, and occupied by Mrs. Webb. As far as can be ascertained this inn was situated in the area known today as Chinn’s Yard, an alley on the south side of the Market Place. There is, of course, an old malthouse building still surviving there today, which maybe confirms the location of the Nag’s Head.
Thomas Singer was the tenant in 1822, but he had moved to the Red Lion, Warminster, before 1830. As no other records are available, it seems likely that the Nag’s Head closed during this period.
Halliday stated in about 1830 that “it is now occupied by Elling the butcher”. The Elling family were butchers at the Market Place from at least 1830 to 1859. Halliday also noted that the property was at one time occupied by “Alderman” Gough.
By the time of the 1838 Survey Of Warminster a beerhouse at Portway was using the name of the Nag’s Head.