From the Wikipedia page: Hanged, drawn and quartered
Although the Act of Parliament defining high treason remains on the United Kingdom’s statute books, during a long period of 19th-century legal reform the sentence of hanging, drawing and quartering was changed to drawing, hanging until dead, and posthumous beheading and quartering, before being abolished in England in 1870. The death penalty for treason was abolished in 1998.
The 19th-century legal reform really softened penalties for those no-good traitors.