General Defences in Tort

Meaning: to a willing person, no injury is done. If the plaintiff voluntarily agrees to take the risk of harm, he cannot sue.

Conditions:

1. The plaintiff must have full knowledge of the risk (not merely that danger exists: Dann v Hamilton, passenger who got into car with a drunk driver; the House still considered volenti not established).

2. The plaintiff must have freely and voluntarily agreed to the risk (not under compulsion or pressure of duty).

3. The act must be within the scope of the consent (consent to a medical operation is not consent to a different operation).

Cases:

• Hall v Brooklands Auto Racing Club — spectator at car race accepted the risk of cars leaving the track.

• Smith v Baker — employee's knowledge of danger is not by itself consent; knowledge is not assent.

• Nettleship v Weston — a driving instructor who checked insurance did not consent to the risk of negligent driving; volenti failed.

• Wooldridge v Sumner — sports participant accepts risks of a game played according to rules.

• Rescue cases: Haynes v Harwood; Baker v T.E. Hopkins & Son (doctor who tried to rescue workers in a well; volenti rejected). The rule: rescuer's act is natural and probable and not voluntary assumption of risk.

• Exceptions: volenti does not apply in cases of statutory duty, rescue, and where the defendant's act is unlawful (e.g., consent to being unlawfully injured).

• Consent and medical treatment: Samira Kohli v Dr Prabha Manchanda (2008) — valid consent requires adequate information; consent for diagnostic procedure does not extend to therapeutic procedure unless emergency.

• Limits under CPA: exclusion clauses cannot defeat statutory consumer rights.

Volenti vs contributory negligence: volenti is a complete defence (voluntary assumption of risk); contributory negligence is a partial defence (reduces damages).

An act done to prevent greater harm may be justified. Two forms: private necessity (to protect one's own interest) and public necessity (to protect the community).

• Cope v Sharpe — trespass to land to prevent a fire from spreading to the landlord's property justified.

• Leigh v Gladstone — force-feeding a prisoner on hunger strike held justified (preservation of life).

• Carter v Thomas — entering to extinguish a fire.

• Esso Petroleum v Southport Corporation — discharge of oil to save the ship.

• Kirk v Gregory — mere removal of jewellery to what the defendant thought a safer place was not necessity (unnecessary act causes loss).

• Medical necessity: treating an unconscious patient (F v West Berkshire Health Authority, in a best-interest context).

• Under Indian law, necessity also appears in criminal law (BNS general exceptions); in tort, it must be reasonable and proportionate.

Any person may use reasonable force to protect self, family, or property from unlawful aggression. The force must be proportionate; excessive force is not a defence. Bird v Holbrook — spring-gun set to protect a garden; the defendant was liable because the danger was disproportionate and unannounced, also affecting an innocent person. Under criminal law, the right of private defence is codified in the Bharatiya Nyaya Sanhita 2023 (replacing IPC Sections 96–106); the tort rule parallels that.

A natural event, extraordinary and unforeseeable, without human intervention, so overwhelming that no reasonable human foresight or care could have prevented it.

• Nichols v Marsland (1876) — extraordinary rainfall breaking artificial lakes; defendant not liable.

• Greenock Corporation v Caledonian Railway — extraordinary rainfall; not Act of God because it could have been prevented by better works.

• Essentials: (i) natural forces, (ii) unforeseeable and extraordinary, (iii) no human agency, (iv) an incapacity to guard against it by reasonable care.

• It is an exception to strict liability (Rylands v Fletcher) but is not available in absolute liability (M.C. Mehta).

An accident that could not have been avoided by ordinary care, caution and skill. The burden of proof lies on the defendant. Stanley v Powell — a shot rebounded from a tree and injured a beater; the defendant was not liable. Brown v Kendall — accidental injury while separating fighting dogs. Holmes v Mather — a runaway horse. Key distinction: inevitable accident relates to a physical event not preventable with care, whereas Act of God is a specific natural event.

Mistake of fact or law is generally not a defence in tort, although it can negate intention in rare cases, e.g., malicious prosecution (reasonable and probable cause). Consolidated Co v Curtis (an auctioneer sold goods of the wrong owner; liable for conversion); Hollins v Fowler (honest purchase for the principal was still conversion). Mistake is a defence in defamation only in a limited sense of unintentional defamation under statutory frameworks (Hulton v Jones, the defendant was liable even though the mistake was innocent).

Acts authorised by statute are not actionable if done within the powers and without negligence.

• Vaughan v Taff Vale Railway — sparks from a locomotive set fire to the plaintiff's woods; railway not liable because it used proper care and the statute authorised the engine.

• Hammersmith Rail Co v Brand — vibration damage from railway operation; no remedy under common law.

• Metropolitan Asylum District v Hill — hospital for smallpox patients; the statute was permissive, not mandatory, so nuisance was not justified.

• Rule: if the statute is mandatory, the defendant is protected even from inevitable nuisance; if permissive, the defendant must exercise powers without causing nuisance.

• Indian case: Municipal Corporation of Delhi v Subhagwanti (1966) — collapse of the clock tower; statutory authority does not excuse negligence.

Where plaintiff's own negligence contributes to the harm, the damages are apportioned under the Law Reform (Contributory Negligence) Act 1945 (England); Indian courts follow the same principle of apportionment even without a statute (Motor Vehicles claims often apply it).

• Butterfield v Forrester (1809) — plaintiff riding fast, failed to see an obstruction; no recovery under the old law.

• Davies v Mann — the last opportunity rule; the defendant who had the last clear chance to avoid the accident was liable.

• British Columbia Electric Railway v Loach — a modification of the last opportunity rule.

• Children: a child is judged by the standard of a child of that age (Jones v Boyce, in the context of rescue and reasonable reaction).

• Standard: the plaintiff must also take reasonable care of himself (e.g., seat belts: Froom v Butcher, damages reduced by 15–25% for not wearing seat belts).

• Effect: partial defence (reduction of damages), not a complete bar in modern law.

• Judicial acts: a judge acting judicially is immune, even if erroneous or malicious, provided he acts within jurisdiction. In India, the Judicial Officers' Protection Act 1850 gives protection for acts done in good faith; Anderson v Gorrie; Sirros v Moore.

• Executive acts: acts of the executive in the exercise of authorised statutory power are protected; if they are done in excess of authority, the officer is personally liable.

• Quasi-judicial acts: same protection when acting judicially.

Parents, teachers and persons in loco parentis may inflict reasonable and moderate chastisement for the child's correction. The protection extends to teachers (in India, subject to the Right to Education Act 2009, Section 17, which prohibits physical punishment and mental harassment). Excessive punishment is actionable and criminal.

Expect: matching defence with case; "which is NOT a defence in tort"; difference between volenti, contributory negligence, inevitable accident, Act of God; essentials of Act of God; statutory authority (mandatory vs permissive); last opportunity rule; scope of rescue cases; Assertion–Reason on whether Nichols v Marsland applies to absolute liability.