Introduction
In the law of tort, once a claimant has established that a defendant owes them a duty of care, has breached that duty, and has caused damage, the court must then consider the issue of remoteness. The principle of remoteness determines the extent of a defendant's liability for the consequences of their negligence. A key principle within this area is the 'eggshell-skull' or 'thin skull' rule. This rule dictates that a defendant must take their victim as they find them. This means that if the type of injury suffered by the claimant is reasonably foreseeable, the defendant is liable for the full extent of that injury, even if its severity is due to a pre-existing vulnerability of the claimant which was not foreseeable. This essay will explain the operation of the eggshell-skull rule, with particular focus on its application to psychiatric harm as demonstrated in the case of Brice v Brown [1983] 1 All ER 997.
The Foundation of the Rule
The modern formulation of the eggshell-skull rule is closely associated with the test for remoteness of damage established in Overseas Tankship (UK) Ltd v Morts Dock and Engineering Co Ltd (The Wagon Mound) (No 1) [1961] AC 388. This case decided that a defendant is only liable for damage that is of a foreseeable type or kind. The eggshell-skull rule acts as an important qualification to this principle. Once the type of injury is established as foreseeable, the rule ensures that the defendant is liable for the full extent of the harm, even if the precise extent was unforeseeable due to the claimant's particular weakness.
The classic authority for this principle is Smith v Leech Brain & Co Ltd [1962] 2 QB 405. In this case, a worker was splashed on the lip with molten metal due to his employer’s negligence. The burn was a foreseeable type of injury. However, the worker had a pre-existing, but dormant, cancerous condition. The burn triggered the cancer, and he subsequently died. The defendants argued they were not liable for his death, as it was an unforeseeable consequence of a minor burn. The court rejected this argument, holding that as a burn was a foreseeable injury, the defendant was liable for all the consequences which flowed from it, including the activation of the cancer and the claimant's death. Lord Parker CJ stated that the Wagon Mound did not overrule the principle that a tortfeasor takes their victim as they find them.
Brice v Brown and Psychiatric Vulnerability
The eggshell-skull rule is not confined to physical vulnerabilities; it extends to the claimant's psychological and psychiatric state. The case of Brice v Brown [1983] 1 All ER 997 provides a clear illustration of this principle in action. The claimant, a 16-year-old girl, was involved in a taxi accident caused by the defendant's negligence. She sustained minor physical injuries, but the trauma of the accident, combined with her mother’s subsequent distressed reaction, triggered a severe and permanent mental illness. Medical evidence showed she had a pre-existing personality disorder which made her highly susceptible to a mental breakdown, although this was not apparent before the accident.
The legal question was whether the defendant was liable for the full extent of this severe psychiatric harm, which was far greater than what a person of 'ordinary fortitude' would have suffered. Stuart-Smith J held that the defendant was liable. The test applied was whether it was reasonably foreseeable that an adult of ordinary fortitude would have suffered some form of psychiatric damage as a result of the accident. The judge found that it was. Since some psychiatric injury was foreseeable, the defendant had to take the claimant as they found her, including her hidden psychological vulnerability. Therefore, the defendant was held responsible for the full, unexpectedly severe extent of her mental illness. This case confirms that so long as some psychiatric injury is foreseeable, the defendant is liable for the entire extent of the harm, even if it is exacerbated by a pre-existing 'thin skull' personality (Horsey and Rackley, 2021).
Conclusion
In conclusion, the eggshell-skull rule is a long-standing and important principle in the law of negligence. It operates as a crucial exception to the general rule of remoteness, ensuring that a claimant who suffers unexpectedly severe harm due to a pre-existing condition is not left without a remedy. As demonstrated in Smith v Leech Brain & Co Ltd, where a foreseeable type of physical injury occurs, the defendant is liable for the full extent of the consequences. The decision in Brice v Brown confirms that this principle applies with equal force to psychiatric harm. As long as some form of psychiatric injury is a foreseeable consequence of the defendant's negligence to a person of ordinary firmness, the defendant will be liable for the entire scope of the psychiatric illness that the particularly susceptible claimant suffers. The rule therefore ensures that the wrongdoer, rather than the innocent and vulnerable victim, bears the cost of the full harm caused.
References
- Horsey, K. and Rackley, E. (2021) Tort Law. 7th edn. Oxford University Press.
- Brice v Brown [1983] 1 All ER 997.
- Overseas Tankship (UK) Ltd v Morts Dock and Engineering Co Ltd (The Wagon Mound) (No 1) [1961] AC 388.
- Smith v Leech Brain & Co Ltd [1962] 2 QB 405.
