Laws made by judges in courts. When a case appears before them, they must make a judgement and this forms the law. It must be followed in similar cases in the future.
This called ‘common law’, that is judge made law.
There is a court hierarchy system and lower courts must abide by the decisions and rules made by higher courts.
Statutory interpretation
This is where judges in senior courts are called upon to interpret words and phrases within a law. They have the ability to interpret the meaning of the law and make a verdict on the case.
Overruling past decisions
There are several options for not following a past decision if it is deemed inappropriate, such as distinguishing or overruling. This is only permitted by the very senior courts.
Advantage of judicial precedent - quick and doesn't have to go through Parliament.
Disadvantage of judicial precedent - may be biased towards a particular case