In 1777 in the town of Clonmel, County Tipperary a code of practice was drawn up for the regulation of duels. The Code Duello, known generally as "The twenty-six commandments", was to be kept in a gentleman's pistol case for reference should a dispute arise regarding procedure. The authorities were generally opposed to duelling but were rarely active in suppressing it, and turned a blind eye to injuries and deaths caused on the field of honour. While the reasons for the disappearance of the duel are many, they include the emergence of a new middle class in the Victorian era which was hostile to the "honour" culture, which was seen as un-Christian.
Four British Prime Ministers engaged in duels: the Earl of Shelburne (1780), William Pitt the Younger (1798), George Canning (1809) and the Duke of Wellington (1829).