The doctrine of precedent is based on the principle that like cases should be treated alike.
Cases with the same or similar material facts should be decided in the same way.
Decisions made in higher level courts carry greater weight than those lower in the hierarchy.
A court is normally bound by those higher or equal to them.
Ratio Decidendi
Latin phrase
The reason for the decision
Potentially binding part of a legal decision
Obiter Dictum
Latin phrase
'Things said in passing'
Binding Precedent
A decided case that must be applied in a later case even if it is considered to have been wrongly decided.
Exists when the material facts of a case are similar to those of an earlier decision in a higher or equivalent court.
Persuasive Precedent
One which may be followed by a court but there is no compulsion on the courts to do so.
Ratio
Legal rule and associated reasoning that is essential to the resolution of the case.
Conclusion reached by the application of the relevant legal rule to the material facts.
Court of Justice of the EU
Not bound by its own previous decisions.
Strongly persuaded by its own previous decisions and rarely departs in practice in the interests of legal certainty.
Supreme Court
Bound by its own previous decisions until 1966.
This was established in the mid-19th Century and was known as the London Tramways Rule.
As the House of Lords was the highest appeal court it was considered in the public interest for its decisions to be final.
This was intended to provide absolute certainty and cut down on cases being brought to court.
Practice Statement 1966
Abolished the London Tramways rule.
Gave the House of Lords sufficient flexibility to deal with novel situations and ensure justice.
Allowed the law to develop in line with the chandes in society.
Practice Statement (Previous Decisions)
Would only be used where a decision caused injustice, uncertainty or hindered the development of the law.
Not sufficient that the earlier decision caused grave concern or was passed by a narrow majority.
R v Secretary of State for the Home Department ex p. Khawaja
Held that before departing from its own decisions, the House of Lords should ensure that continued adherence to precedent involves a risk of injustice and would obstruct the proper development of the law.
Departure from the precedent should be the safe and appropriate way of remedying the injustice and developing the law.
Court of Appeal Civil Division
Young v Bristol Aeroplane Co Ltd highlighted that the CoA was normally bound to follow its own decisions subject to three exceptions.
Where its own previous decisions conflict.
Where its own previous decisions had been overruled by the House of Lords,
Where its previous decision was made per incuriam.
Per Incuriam
Latin phrase
'Through carelessness'.
Court of Appeal Criminal Division
All the exceptions from Young v Bristol Aeroplane apply.
However in practice the Court of Appeal gives itself wider discretion in criminal cases where individual liberty is at stake.
The Divisional Courts and High Court
Bound by their own decisions.
Subject to the same exceptions as the Civil Division at the Court of Appeal.
Decisions of the Divisional Court are binding on the High Court for that particular Division.
However, High Court decisions are not binding on the Divisional Courts.
High Court Judges
Decisions of individual High Court judges are binding on lower courts but not other High Court judges.
However they are of strongly persuasive authority in the High Court.
If they are not followed, they are disapproved rather than overruled.
The Crown Court
Not bound by its own decisions.
However, to promote certainty in the criminal law it is strongly persuaded by them.
Inconsistent Crown Court decisions are usually resolved by an appellate court.
County Court, Family Court, Magistrates' Court
Not bound by their own decisions.
Bind no other courts.
Decisions made at this level are rarely of any legal importance.
However their decisions can be considered on appeal in the higher courts.
Distinguishing
Where the court decides that the case before it is materially different on its facts.
Overruling
When a court higher in the hierarchy overturns the decision of a lower court in a different case.
Reversing
When a court higher in the hierarchy overturns the decision of a lower court in the same case.