Introduction
In the constitutional framework of the United Kingdom, the relationship between Parliament and the courts is a cornerstone of the legal system. The traditional doctrine of parliamentary sovereignty posits that Parliament is the supreme law-making body, with the power to create or abolish any law. Conversely, the judiciary's role is often described as merely interpreting and applying the laws that Parliament has enacted. However, this view understates the significant creative function of the courts. This essay will argue that while Parliament holds ultimate legal authority, the courts, through their development of the common law and their power of statutory interpretation, play a more active and dynamic role in shaping the day-to-day content of the law. The essay will examine the legislative power of Parliament before contrasting it with the judiciary’s law-making functions, concluding that the courts' influence is arguably more pervasive in practice.
The Legislative Supremacy of Parliament
The classic view of the UK constitution, most famously articulated by A.V. Dicey, is centred on the principle of parliamentary sovereignty. According to this doctrine, Parliament has the competence to legislate on any subject matter, no Act of Parliament can be questioned by the courts, and no Parliament can bind its successors (Dicey, 1915). This means that statute law, originating from Parliament, is the highest form of law in England and Wales. When Parliament passes an Act, it can create entirely new areas of law, reform existing ones, or codify principles previously established by the common law. For example, the Equality Act 2010 consolidated and reformed decades of discrimination law, providing a single, comprehensive legal framework.
Furthermore, Parliament has the power to override or reverse judicial decisions. If the courts develop a common law principle that Parliament finds undesirable, it can pass legislation to nullify that decision. A clear historical example is the case of Burmah Oil Co Ltd v Lord Advocate [1965] AC 75, where the House of Lords held that the government was liable to pay compensation for the destruction of oil fields during wartime. Parliament responded swiftly by passing the War Damage Act 1965, which retrospectively removed this liability. This demonstrates Parliament’s ultimate power to have the final say on what the law is, reinforcing its position at the apex of the legal system. In this formal sense, Parliament’s role in creating and shaping law is unparalleled.
The Judicial Development of the Common Law
Despite the supremacy of Parliament, a vast proportion of English law is not contained in statutes but is found in the common law, which is law made by judges through the system of judicial precedent. In areas where Parliament has not legislated, or has legislated only partially, judges have developed legal principles on a case-by-case basis. The laws of contract, tort, and much of criminal law are prime examples of areas that were historically, and in large part remain, judge-made.
The tort of negligence provides a powerful illustration of the courts' creative role. The modern law of negligence was effectively established in the landmark case of Donoghue v Stevenson [1932] AC 562. In his judgment, Lord Atkin formulated the ‘neighbour principle’ to determine the existence of a duty of care, creating a fundamental legal principle from scratch where no statute applied. This single judicial decision has shaped the content of personal injury and liability law for almost a century, generating a huge body of case law as subsequent judges have applied, refined, and extended the principle.
The courts also shape the law by adapting it to reflect changing social values, a role that the slower, more political process of legislation can sometimes struggle to fulfil. In R v R (Marital Exemption) [1992] 1 AC 599, the House of Lords abolished a 250-year-old common law rule that a husband could not be criminally liable for raping his wife. The court recognised that the old rule was anachronistic and offensive, and it updated the law to align with modern perceptions of marriage and consent. In doing so, the judiciary was not merely applying law but actively changing it, demonstrating a significant capacity to shape the content of criminal law.
The Power of Statutory Interpretation
Perhaps the most consistent and powerful way the courts shape the law is through the interpretation of statutes. While Parliament creates legislation, its words are not self-enforcing. Statutes are often drafted in broad terms and cannot anticipate every possible scenario. It falls to the judiciary to interpret the statutory language and apply it to the specific facts of a case. This interpretive function is not a mechanical exercise but a creative one that gives meaning and practical effect to the law. As Lord Denning noted, judges are not "automatons" but must fill in the gaps in legislation (Denning, 1979).
The approach to statutory interpretation has evolved from the strict literal rule towards a more purposive approach, where judges seek to ascertain and give effect to the purpose behind the legislation. This gives judges considerable discretion. The influence of this role was dramatically enhanced by the Human Rights Act 1998 (HRA). Section 3 of the HRA requires courts to read and give effect to all primary and subordinate legislation in a way that is compatible with the European Convention on Human Rights "so far as it is possible to do so". This has been interpreted as a powerful tool, allowing judges to effectively rewrite legislation to protect human rights.
The case of Ghaidan v Godin-Mendoza [2004] 2 AC 557 is a leading example. The House of Lords had to interpret the Rent Act 1977, which allowed the surviving spouse of a protected tenant to succeed to the tenancy. The term ‘spouse’ had been interpreted to mean a person living with the tenant "as his or her wife or husband". The court used its power under section 3 of the HRA to read these words as including a surviving same-sex partner, even though this was almost certainly not Parliament’s original intention when the Act was passed. This shows the court going far beyond traditional interpretation and actively modifying the content and scope of a statute, a clear demonstration of shaping the law.
Conclusion
In conclusion, the assertion that the courts play a more important role than Parliament in shaping the content of law holds considerable weight, despite the constitutional theory of parliamentary sovereignty. While Parliament is the supreme legal authority with the ultimate power to make and unmake any law, its legislative interventions are often broad and intermittent. In contrast, the judiciary is engaged in a constant process of law-making and development. Through the creation and evolution of the common law, judges have built entire fields of law from first principles. More significantly, through their daily task of statutory interpretation, particularly under the influence of the Human Rights Act 1998, they give concrete meaning to Parliament’s abstract commands. The law as it is experienced by individuals and applied in practice is therefore shaped as much by the judges in the courtroom as by the legislators in Westminster. While Parliament holds the final card with its ability to legislate, the courts are dealing most of the hands.
References
- Denning, A. (1979) The Discipline of Law. Butterworths.
- Dicey, A.V. (1915) Introduction to the Study of the Law of the Constitution. 8th ed. Macmillan.
- Burmah Oil Co Ltd v Lord Advocate [1965] AC 75.
- Donoghue v Stevenson [1932] AC 562.
- Equality Act 2010.
- Ghaidan v Godin-Mendoza [2004] 2 AC 557.
- Human Rights Act 1998.
- R v R (Marital Exemption) [1992] 1 AC 599.
- War Damage Act 1965.
