I understand that the building known as the Wybdham Arms was originanlly Clearwell Manor circa 13th century. ( not to be confused with the Castle !)

http://www.thewyndhamhotel.co.uk/index.php

Greyndour evidently secured an unrestricted title to his wife's estate, which from the early 15th century was known as the manor of CLEARWELL, the chief residence and most of the demesne lands being by then situated in Clearwell tithing. John was succeeded by Robert Greyndour, his son by his first wife Marion. (fn. 29) Robert Greyndour (d. 1443) was jointly enfeoffed of the estate with his wife Joan, (fn. 30) who married before 1455 (fn. 31) John Barre. John died in 1483 (fn. 32) and Joan in 1484, when the Clearwell estate passed to Robert's heir Alice, the wife of Thomas Baynham (fn. 33) (d. 1500) (fn. 34) and later of Sir Walter Dennis (d. 1505 or 1506). Alice (d. 1518) was succeeded by her son Sir Christopher Baynham, (fn. 35) and Sir Christopher was succeeded in the estate, apparently in his lifetime, by his son George Baynham. (fn. 36) George, who was knighted in 1546 and died that year, (fn. 37) left the estate to his son Christopher, who was a minor in the king's custody in 1548. (fn. 38) From Christopher (fl. 1555) (fn. 39) it passed, probably by 1558, (fn. 40) to his brother Richard (d. 1580), who was succeeded by another brother Thomas (fn. 41) (d. 1611). (fn. 42) Thomas Baynham settled his estates in Newland and the adjoining parishes on his elder daughter Cecily, wife of Sir William Throckmorton, Bt., while his younger daughter Joan, wife of John Vaughan, received estates that he owned elsewhere in the Forest area. (fn. 43)
Sir William Throckmorton (d. 1628) was succeeded in the Clearwell estate by his son Sir Baynham (d. 1664) (fn. 44) who paid a large fine to recover his estate from sequestration after the Civil War but forfeited it again later, buying it back in 1653. Before his death Sir Baynham apparently made the estate over to his son and heir, and the son, also Sir Baynham, was still in debt in 1672 as a result of the recovery of the estate. (fn. 45) The younger Sir Baynham Throckmorton died c. 1680, having provided for his estate to be sold for the benefit of his wife Catherine and his daughters. In 1684 James Stephens agreed to purchase the estate but died before completion, and in 1698 Catherine, her daughter Catherine Wild, her stepdaughter Carolina Scrymsher, and Stephens's widow Barbara sold Clearwell to Francis Wyndham. (fn. 46) From Francis Wyndham (d. 1716) the estate passed in the direct male line to John (d. 1725), Thomas (d. 1752), (fn. 47) and Charles. Charles Wyndham inherited the Glamorganshire estates of Dunraven Castle and Llanvihangel, and under the will of the uncle who left him the latter he took the surname Edwin. He died in 1801, when he was succeeded by his son Thomas Wyndham (d. 1814). Thomas was succeeded by his daughter Caroline, wife of Windham Henry Quin of Adare (co. Limerick), who took the additional surname Wyndham. W. H. Wyndham Quin, who had the courtesy title of Viscount Adare from 1822 and succeeded to the earldom of Dunraven and Mount-Earl in 1824, died in 1850; Caroline, countess of Dunraven, retained Clearwell until her death in 1870. (fn. 48) Under family trusts the estate passed before 1876 to the countess's grandson Windham Henry Wyndham Quin, who with the trustees conveyed it c. 1882 to John Eveleigh Wyndham (fn. 49) (d. 1887). (fn. 50)

In 1893 the Wyndham trustees sold the estate to Henry Collins, whose mortgagees later secured possession (fn. 51) and in 1907 offered the estate for sale. It then comprised Clearwell Court and 14 farms in Newland and St. Briavels, a total of 2,300 a. (fn. 52) A large portion, comprising Noxon and Trowgreen farms and Noxon Park wood, was sold in 1907 to the Crown Commissioners of Woods, and a larger portion to Col. Alan Gardner, the tenant of Clearwell Court. Gardner died a few days after completing the purchase and his executors sold his estate in 1910 to James Lewis. Lewis sold the farms in 1912 to the Commissioners of Woods, (fn. 53) having sold the house and its park the previous year to Charles Vereker, later Col. Vereker, who died in 1947. (fn. 54) In 1992 the Crown's Clearwell estate covered 487 ha. (1,203 a.), formed of Noxon, Longley, Platwell, and Wainland farms in Newland and Bearse farm in St. Briavels. (fn. 55)

From: 'Newland', A History of the County of Gloucester: Volume 5: Bledisloe Hundred, St. Briavels Hundred, The Forest of Dean (1996), pp. 195-231. URL: http://www.british-history.ac.uk/report.aspx?compid=23260 Date accessed: 12 April 2010.

--
Ἀριστοτέλης A Gloster & Hereford Boy in the Forest of Dean ><((((*>

I think the current proprietors could help. The home page of the hotel's website (www.thewyndhamhotel.co.uk) refers to it as "our 13th century former manor house." On www.booking.com/hotel/gb/wyndhamarms.en.html it says "the building dates back to the 13th century". There is similar info on enjoy-gloucestershire.co.uk. Even if it's now on a registered title, there might well be historical deeds retained with the current title documents, of which the present owners, or their solicitors, would have knowledge. Difficult to believe these references to the 13th century are just hype.

http://www.gloucestershirecamra.org.uk/pubs/glospubs/new/

The earliest reference to the inn is in 1347, in the reign of Edward III. A reference in Slater’s 1852 Coleford directory lists the pub as the Wymondham Arms. The Wyndham Arms was for a long time ran by Maynard and Louisa Keyse. Maynard held the license in 1903 and nearly 60 years later Louisa was still serving behind the bar. When John and Rosemary Stanford bought the Wyndham Arms back in 1972 for £20,000 it was, apparently, a dilapidated cider house. Over the next 24 years the couple worked hard building up the facilities and reputation of the Wyndham Arms and in 1997 it was put on the market for £1.5 million.

A report in the Gloucester Citizen (17th June 1997) stated that: “when John and Rosemary purchased the run down Grade II listed building it was taking just £150 a week. Now they serve 40,000 meals each year, put £20,000 a week into the tills, employ 32 staff and have 17 luxury bedrooms.” When John and Rose Stanford finally retired in 2002 they were the longest serving licensees in the Forest of Dean. Their son Robert took over the running of the Wyndham Arms for a further five years.

--
Ἀριστοτέλης A Gloster & Hereford Boy in the Forest of Dean ><((((*>