Reg Cundick and Danny Howell in the book The Inns And Taverns Of Warminster, published in November 1987, stated:
The King’s Arms at Weymouth Street was the third and last of Warminster’s inn to use the name The King’s Arms. It was situated next to the Literary Institute on the corner with Market Place. The inn was part of a block erected to conform with the Town Hall which was built on the opposite side of the street in 1830.
The inn belonged to the Longleat Estate, who put it up for sale on 5th September 1919. The sale particulars described part of it as containing stabling for twelve horses and a coach house with an extensive loft. The latter was usually the place where the coachmen had to sleep overnight.
The cellars here, are extensive, are probably those of the previous inn on the site. A Mr Plowman, who was landlord until October 1928, entered the cellars one day and discovering some loose stonework, pulled it out to reveal a cavity behind. When the rest of the wall was removed, another small cellar was found. This contained some broken racking and bottles, and some racks complete with bottles of wine. The Brewery claimed the wine and eventually auctioned it. This vintage ended up on the maiden voyage of the Queen Mary in 1935.
In December 1974, the landlord, D. Pullen, found a 30 pound I.R.A. bomb planted beneath his car, which was parked in the archway leading to the rear of the premises. It was successfully dealt with by an army bomb disposal team. At the time it was the largest I.R.A. bomb ever planted in this country. Warminster Police commented that it had probably been placed there because the public house was well-patronised by British servicemen from the town’s barracks.
The licensee in 1981, A. Hobday, applied for a licence to retail beer and spirits from the premises, and also from The Bunch Of Grapes next to it. The two pubs, when amalgamated, would be re-named the King Arthur. The licence was granted, and the two pubs officially opened as one on 2nd December 1981. The owners were Ushers Brewery of Trowbridge.