The rule of law is one of the longest established common law fundamental principles of the governance of the United Kingdom, dating to Magna Carta of 1215, particularly jurisprudence following its late 13th century re-drafting. At a minimum, it subjects an otherwise absolute monarch (executive) and all free people within its jurisdictions, primarily those of England and Wales, Scotland and Northern Ireland, to legal doctrines known as the general principles of law. It has evolved to work only alongside equal application of the law to all free people 'equality before the law' and within the framework of the constitutional monarchy supports the legal doctrine of parliamentary sovereignty. Exactly what it entails beyond this and the way that different aspects of the rule of law principle are applied, depends on the specific situation and era.
Among recognised academics in this field are Albert Dicey, Joseph Raz (building on thoughts by Friedrich Hayek) and Trevor Allan, who have proposed contrasting ideas about the scope of the rule of law: specifically, whether the emphasis is on legal form or substantive content and normatively if it should be.