The doctrine of judicial precedent is a fundamental principle of the English legal system. It is the foundation of the common law, which is law made by judges through their decisions in court cases. This essay will explain the main components of judicial precedent, including the concept of *stare decisis*, the importance of the court hierarchy, the distinction between the *ratio decidendi* and *obiter dicta* of a case, and the ways in which judges can avoid or depart from previous decisions. The doctrine aims to provide certainty and consistency in the law, ensuring that similar cases are treated in a similar way.
The Principle of Stare Decisis and the Court Hierarchy
The operation of judicial precedent is based on the Latin maxim *stare decisis et non quieta movere*, which means “to stand by things decided and not to disturb the calm” (Slapper and Kelly, 2019). This principle means that a court is bound to follow the decisions of courts that are higher than it in the judicial hierarchy. The hierarchy of the courts in England and Wales is therefore crucial. The UK Supreme Court is at the top of the civil and criminal court structure, and its decisions are binding on all lower courts, such as the Court of Appeal, the High Court, and the Crown and County Courts.
The Court of Appeal is generally bound by the decisions of the Supreme Court and is also usually bound by its own previous decisions. This rule was established in *Young v Bristol Aeroplane Co Ltd* [1944] KB 718, although the case also set out some limited exceptions where the Court of Appeal could depart from its own past rulings. Lower courts do not create binding precedents but must follow the decisions of the higher courts. This rigid structure promotes predictability in legal outcomes, allowing businesses and individuals to organise their affairs with some confidence about how the law will be applied.
Ratio Decidendi and Obiter Dicta
For the doctrine of precedent to work, it is necessary to identify the part of a judgment that is legally binding. The binding element is known as the *ratio decidendi*, which translates as “the reason for the decision”. It is the legal principle or rule that the judge applies to the material facts of the case to reach their decision. Any subsequent case with similar material facts should, in theory, be decided in the same way by applying the same *ratio decidendi*.
In contrast, any other statements made by a judge that are not part of the legal reasoning for the decision are called *obiter dicta*, meaning “things said by the way”. These might include hypothetical scenarios or wider discussions of the law. While *obiter dicta* are not binding on future courts, they can be a source of “persuasive” authority. A judge in a later case may be influenced by an *obiter* statement, particularly if it was made by a senior judge, but they are not required to follow it (Elliott and Quinn, 2020). Correctly identifying the *ratio* of a case can be difficult, as it is not always explicitly stated by the judge.
Departing from Precedent
Although *stare decisis* creates a system that can appear rigid, there are established mechanisms that provide flexibility and allow the common law to evolve. The most common method used by judges to avoid following a precedent is distinguishing. A judge can distinguish a previous case by finding that its material facts are sufficiently different from the facts of the case before them, meaning the earlier precedent does not apply.
Higher courts also have the power to overrule a precedent set by a lower court in a previous case, which invalidates the legal principle from the earlier case. More significantly, the Supreme Court has the power to overrule its own previous decisions. This was not always the case; the House of Lords (the predecessor to the Supreme Court) considered itself bound by its own decisions following *London Street Tramways v London County Council* [1898] AC 375. This position was changed by the Lord Chancellor, who issued the *Practice Statement (Judicial Precedent)* [1966] 1 WLR 1234. This statement declared that while former decisions were normally binding, the House of Lords could depart from a previous decision when it appeared “right to do so”. This power is used sparingly to promote legal certainty, but it allows the highest court to correct past errors or adapt the law to changing social conditions, as seen in *R v R (Marital Exemption)* [1992] 1 AC 599, which recognised that a husband could be criminally liable for raping his wife.
In conclusion, the doctrine of judicial precedent is a cornerstone of business law and the wider English legal system. Through the principles of *stare decisis* and the court hierarchy, it provides a valuable degree of certainty and consistency. However, it is not an inflexible system. The distinction between the binding *ratio decidendi* and persuasive *obiter dicta*, along with judicial tools like distinguishing and the power of the Supreme Court to depart from its own precedents, ensures that the common law can adapt and develop over time to achieve justice.
References
- Elliott, C. and Quinn, F. (2020) English Legal System. 21st edn. Pearson.
- London Street Tramways v London County Council [1898] AC 375.
- Practice Statement (Judicial Precedent) [1966] 1 WLR 1234.
- R v R (Marital Exemption) [1992] 1 AC 599.
- Slapper, G. and Kelly, D. (2019) The English Legal System. 20th edn. Routledge.
- Young v Bristol Aeroplane Co Ltd [1944] KB 718.
