In 18th-century British politics, the broad bottom government (or broad bottom administration) is a government with cross-party appeal, according (among others) to John Stuart Shaw, "The Political History of Eighteenth-century Scotland", 1999, when he describes the time of the Seven Years' War.[1]
When William Pitt and the Duke of Newcastle joined the (Whig) government in 1757, the war increased consent along party lines and enabled a quick integration of the various Whig parties as well as a quickened integration of the Scots into a British nation.
Other examples of such governments are the Fox - North coalition of 1783 and the Ministry of All the Talents. The first ministry of Henry Pelham, 1744 to 1746, was called the "Broad Bottom ministry"