Under the law of the United Kingdom, high treason is the crime of disloyalty to the sovereign amounting to an intention to undermine their authority, or the attempt to do so. Offences constituting high treason include plotting the murder of the sovereign; having sexual intercourse with the sovereign's consort, with his eldest unmarried daughter, or with the wife of the heir to the throne; levying war against the sovereign and adhering to the sovereign's enemies, giving them aid or comfort; and attempting to undermine the lawfully established line of succession. Several other crimes have historically been categorised as high treason, including counterfeiting money and being a Catholic priest. High treason was formerly distinguished from petty treason, a treason committed against a subject of the sovereign, the scope of which was limited by statute to the murder of a legal superior.