Law of Torts
The Duty of Care: The Neighbour Principle, Proximity, and the Threefold Test in Caparo
Whether a duty of care is owed is the first and the most important question in negligence, because it controls the scope of the whole tort. It is a question of law for the court, and whether the duty was broken is a question of fact. Lord Atkin's neighbour principle in Donoghue v. Stevenson supplied the general test: take reasonable care to avoid acts or omissions you can reasonably foresee would injure your neighbour, meaning persons so closely and directly affected by your act that you ought reasonably to have them in contemplation. The modern threefold test in Caparo adds proximity and a question of policy, and it applies to novel situations rather than to the settled categories.
The neighbour principle, the threefold test, and why the duty question is asked at all
1. The Case That Created the Modern Duty
📖 Donoghue v. Stevenson [1932] AC 562 Facts The appellant went with a friend to a cafe in Paisley. The friend bought her a bottle of ginger beer, manufactured by the respondent. The bottle was of dark opaque glass, so that its contents could not be seen. The shopkeeper poured part of it into a tumbler and she drank it. When the friend poured out the remainder, the decomposed remains of a snail floated out. The appellant alleged that she suffered shock and severe gastro enteritis. She had no contract with anybody: her friend had bought the bottle. Held By a majority of three to two, the manufacturer owed her a duty of care, and the action was maintainable. Ratio Lord Atkin stated the neighbour principle: you must take reasonable care to avoid acts or omissions which you can reasonably foresee would be likely to injure your neighbour, and your neighbour in law is a person so closely and directly affected by your act that you ought reasonably to have him in contemplation as being so affected. Applied to the facts, a manufacturer who sells products in a form showing that he intends them to reach the ultimate consumer in the form in which they left him, with no reasonable possibility of intermediate examination, owes a duty to the consumer to take reasonable care. |
- The narrow ratio is the manufacturer and consumer proposition, and it is what decided the case.
- The wide ratio is the neighbour principle, and it is what changed the law, because it supplied a test capable of extension to relationships never litigated before.
- Lord Buckmaster's dissent is worth knowing: he held that the authorities established no such duty, that the two recognised exceptions were exhaustive, and that the majority was legislating. It is Salmond's pigeon hole theory applied.
- Grant v. Australian Knitting Mills [1936] AC 85 confirmed and applied the principle, where underwear containing an excess of a chemical caused dermatitis.
2. The Neighbour Principle Examined
- Reasonable foreseeability is the core. The question is what a reasonable person in the defendant's position would have foreseen, not what this defendant actually foresaw.
- "Neighbour" is defined by closeness and directness, not by physical proximity. A manufacturer in one country may be the neighbour of a consumer in another.
- It is a principle and not a rule. Lord Atkin himself said it was a general conception which the law limits in its application.
- Foreseeability alone was never sufficient, and the later cases have made that explicit. A great deal of foreseeable harm is caused every day by conduct the law does not touch.
- The principle has been most cautiously applied in three areas: pure economic loss, psychiatric harm, and omissions, each of which is dealt with in its own place.
3. The Threefold Test
📖 Caparo Industries plc v. Dickman [1990] 2 AC 605 Facts The plaintiffs bought shares in a company in reliance on its audited accounts, and then made a takeover bid. They alleged that the accounts were inaccurate and that the auditors had been negligent. The question was whether the auditors owed a duty of care to an investor who bought shares in reliance on the audit. Held No duty was owed, either to existing shareholders buying more shares or to members of the public. Ratio Three requirements must be satisfied before a duty of care arises: the damage must have been reasonably foreseeable; there must be a relationship of sufficient proximity between the parties; and it must be fair, just and reasonable to impose a duty. The auditors' statutory duty was owed to the company for the purpose of enabling the shareholders as a body to exercise informed control, and not for the purpose of guiding investment decisions. |
The limb | What it asks | What it screens out |
Foreseeability | Would a reasonable person have foreseen damage of this kind to a person in the plaintiff's position? | The freakish, the improbable, and the wholly unexpected plaintiff |
Proximity | Was there a relationship of sufficient closeness and directness between the parties? | Claims by persons too remote from the defendant in space, time or relationship |
Fair, just and reasonable | Should the law impose a duty in this situation, as a matter of policy? | Claims that would open the floodgates, chill a public function, cut across another body of law, or produce indeterminate liability |
4. How the Test Is Actually Used
1. It applies to novel situations, not to settled categories. Where a duty is established, as between road users, employer and employee, doctor and patient, or manufacturer and consumer, the Caparo questions are not reopened and the argument moves straight to breach.
2. The third limb is where policy enters openly, and that is its value. It replaced the older practice of concealing policy decisions inside findings about foreseeability.
3. The modern preference is for incremental development. The courts develop the law by analogy with established categories rather than by applying a single general formula.
4. Proximity is not a test so much as a label for the conclusion that the relationship was close enough, and it has been criticised on that account.
5. The three limbs overlap, and a court will often decide the case on one of them while noting that the others point the same way.
6. In India the neighbour principle is applied directly, with Caparo used as a guide rather than as a rigid formula.
5. Why the Duty Question Exists at All
⚠ Duty is the control mechanism of the tort Foreseeable harm is caused every day by conduct that the law does not and should not touch. A shopkeeper who opens a rival store foreseeably ruins his competitor; an employer who closes a factory foreseeably impoverishes a town; a person who cancels a contract foreseeably damages his supplier's suppliers. If foreseeability alone founded liability, the tort would have no boundaries. The duty question is the device by which the law decides which foreseeable harms it will compensate, and the third limb of Caparo is where that decision is now made openly. It is also why the three difficult areas of the modern law, pure economic loss, psychiatric harm and omissions, are all duty problems rather than breach problems: in each of them the harm is plainly foreseeable, and the question is whether the law should recognise a duty to avoid it. |
6. The Position Stated Shortly
1. Whether a duty of care is owed is a question of law for the court; whether it was broken is a question of fact.
2. Donoghue v. Stevenson established the neighbour principle, and made negligence a tort with a general principle at its centre.
3. Lord Atkin's test is to take reasonable care to avoid acts or omissions reasonably foreseeable as likely to injure one's neighbour.
4. A neighbour is a person so closely and directly affected by the act that one ought reasonably to have him in contemplation.
5. The narrow ratio is the duty of a manufacturer to the ultimate consumer where no intermediate examination is likely.
6. Foreseeability alone was never sufficient, and the modern test in Caparo adds proximity and a question of policy.
7. The three limbs are reasonable foreseeability, sufficient proximity, and whether it is fair, just and reasonable to impose a duty.
8. The threefold test applies to novel situations; in the settled categories the duty is taken as given.
9. The third limb is where policy is now considered openly, and the courts prefer incremental development by analogy.
10. The duty question is the control mechanism of the tort, which is why pure economic loss, psychiatric harm and omissions are duty problems.