Introduction
The case of Mullin v Richards is a significant Court of Appeal decision within the English law of tort, specifically concerning the tort of negligence. It is a leading authority on the standard of care expected of a child defendant. The case addresses the question of whether the objective 'reasonable person' test should be modified to account for the age of the defendant. This summary will outline the facts of the case, the legal issue the court had to decide, and the reasoning behind its judgment, which confirmed that children are to be judged by the standard of a reasonable child of the same age.
Facts of the Case
The claimant and the defendant were two 15-year-old female friends. During a lesson at school, they were engaging in a mock sword fight using plastic rulers. This was a form of 'horseplay' between the two girls. During this activity, the defendant’s ruler snapped, and a fragment of the plastic flew into the claimant’s right eye. The injury was severe and resulted in the claimant losing all useful sight in that eye, a condition known as sympathetic ophthalmia. The claimant brought an action in negligence against the defendant for the injuries she sustained. At the initial trial, the judge found the defendant liable, holding that the injury was a foreseeable result of the 'sword fight'. The defendant subsequently appealed this decision to the Court of Appeal.
The Legal Issue and Decision
The central legal issue for the Court of Appeal was to determine the correct standard of care to be applied to a 15-year-old girl engaged in what was described as horseplay. The question was whether the defendant's actions should be judged against the standard of a hypothetical reasonable adult, or whether her age should be taken into account, meaning she would be judged against the standard of a reasonable and prudent 15-year-old.
The Court of Appeal unanimously allowed the appeal, overturning the trial judge's decision. It held that the appropriate standard of care was that of an ordinary, careful, and reasonable child of the defendant’s age. Applying this standard, the court found that a reasonable 15-year-old would not have foreseen that the game of fencing with plastic rulers carried a risk of a ruler shattering and causing a serious eye injury. Therefore, the defendant had not breached her duty of care, and was not liable in negligence.
The Court's Reasoning
The Court of Appeal's reasoning was heavily influenced by the Australian High Court case of McHale v Watson (1966), which had previously established a similar principle for child defendants in Australia. The judges in Mullin v Richards approved and adopted this approach for English law. Butler-Sloss LJ, giving the leading judgment, stated that the test for foreseeability is not what a reasonable adult would have foreseen, but "whether an ordinarily prudent and reasonable 15-year-old schoolgirl in the defendant's situation would have realised that her actions gave rise to a risk of injury" (Horsey and Rackley, 2021, p.236).
The court distinguished the situation from cases like Nettleship v Weston [1971] 2 QB 691, where a learner driver was held to the same standard as a reasonably competent and experienced driver. The court reasoned that activities like driving are adult activities that require a single, objective standard for the safety of the public. In contrast, the 'ruler fight' was viewed as typical horseplay for children of that age. The judges concluded that while such games were common and often resulted in minor incidents, the risk of a serious injury of this nature was not something that a 15-year-old would reasonably be expected to anticipate. As Hale LJ noted, the girls’ game was simply "the schoolgirl equivalent of a bout of fencing" and did not involve a foreseeable risk of significant harm.
Conclusion
In summary, Mullin v Richards is a key authority which confirms that the standard of care in negligence is not entirely objective and can be adapted to the characteristics of the defendant, specifically their age. The case establishes that a child defendant will be judged by the standard of a reasonable person of the same age. It illustrates a key exception to the general rule established in cases like Nettleship v Weston and provides clarity on how the courts should assess foreseeability and breach of duty when the defendant is a minor.
References
Horsey, K. and Rackley, E. (2021) Tort Law. 7th edn. Oxford: Oxford University Press.
McHale v Watson (1966) 115 CLR 199.
Mullin v Richards [1998] 1 WLR 1304.
Nettleship v Weston [1971] 2 QB 691.
