THE DOCTRINE OF BINDING PRECEDENT
The doctrine of binding precedent means the process whereby judges follow previously decided cases where the facts are of sufficient similarity. The doctrine of judicial precedent involves an application of the principle of stare decisis i.e., to stand by the decided. In practice, this means that inferior courts are bound to apply the legal principles set down by superior courts in earlier cases. This provides consistency and predictability in the law. RATIO DECIDENDI AND OBITER DICTUM
The decision or judgement of a judge may fall into two parts: the ratio decidendi (reason for the decision) and obiter dictum (something said by the way). RATIO DECIDENDI - The ratio decidendi of a case is the principle of law on which a decision is based. When a judge delivers judgement in a case he outlines the facts which he finds have been proved on the evidence. Then he applies the law to those facts and arrives at a decision, for which he gives the reason (ratio decidendi). OBITER DICTUM - The judge may go on to speculate about what his decision would or might have been if the facts of the case had been different. This is an obiter dictum. The binding part of a judicial decision is the ratio decidendi. An obiter dictum is not binding in later cases because it was not strictly relevant to the matter in issue in the original case. However, an obiter dictum may be of persuasive (as opposed to binding) authority in later cases. A difficulty arises in that, although the judge will give reasons for his decision, he will not always say what the ratio decidendi is, and it is then up to a later judge to "elicit" the ratio of the case. There may, however, be disagreement over what the ratio is and there may be more than one ratio. THE COURT HIERARCHY
THE EUROPEAN COURT OF JUSTICE
Under s3(1) of the European Communities Act 1972, decisions of the ECJ are binding, in matters of Community law, on all courts up to and including the House of Lords. THE HOUSE OF LORDS
This is the highest court in the land unless a matter of EC law is involved. The House of Lords was bound by its own previous decisions until 1966 when Lord Gardiner LC announced a change of practice. The Practice Statement  stated that although the House of Lords would treat its decisions as normally binding it would depart from these when it appeared right to do so. This power has been used sparingly. A decision of the House of Lords binds all lower courts.
COURT OF APPEAL (CIVIL DIVISION)
The Court of Appeal is bound by decisions of the House of Lords even if it considers them to be wrong. In Young v Bristol Aeroplane Co Ltd  the Court of Appeal held that it was bound by its own previous decisions subject to the following three exceptions: * Where its own previous decisions conflict, the Court of Appeal must decide which to follow and which to reject. * The Court of Appeal must refuse to follow a decision of its own which cannot stand with a decision of the House of Lords even though its decision has not been expressly overruled by the House of Lords. * The Court of Appeal need not follow a decision of its own if satisfied that it was given per incuriam (literally, by carelessness or mistake). Decisions of the Court of Appeal itself are binding on the High Court and the county court COURT OF APPEAL (CRIMINAL DIVISION)
In principle there is no difference in the application of stare decisis in the civil and criminal divisions of the Court of Appeal. In practice, however, in addition to the Young exceptions, because a person's liberty may be at stake, precedent is not followed as rigidly in the criminal division. In R v Taylor  the Court of Appeal held that in 'questions involving the liberty of the subject' if a full court considered that 'the law has either been misapplied or misunderstood' then it must reconsider the earlier decision. THE HIGH COURT
The High Court is bound by the Court of Appeal and the House...
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