The answer depends on the module, the exam format, and your university's expectations.
Quality Over Quantity
It is far better to know 8 well-chosen cases thoroughly than to have a vague recollection of 30. For each case, know the facts, the legal issue, the ratio decidendi, and why the case matters.
How to Choose Which Cases to Memorise
Focus on cases that establish a key principle, develop or refine the law, are frequently cited by your lecturer, appear in past papers, or involve a dissent or controversy.
Rough Guidelines by Module
| Module | Key Cases | Supporting Cases |
|---|---|---|
| Contract Law | 15-20 | 10-15 |
| Tort Law | 15-20 | 10-15 |
| Criminal Law | 12-18 | 8-12 |
| Public Law | 10-15 | 8-10 |
| Land Law | 12-15 | 8-10 |
| Equity & Trusts | 15-20 | 10-12 |
Your lecturer's reading list and past papers are the best guide to which cases matter most.