Miss Stone, the plaintiff, was standing on a public road adjacent to a cricket ground operated by a local club. The cricket pitch was situated such that the striker's crease was approximately 100 yards from where she stood. The ground had a high perimeter barrier that stood about 17 feet above road level. On the day in question, a batsman hit a ball with unusual force; it cleared the protective barrier and struck Miss Stone, causing injury. Evidence showed that, over roughly 30 years, balls had very infrequently been hit out of the ground toward the road—about six occasions in total—and no person had previously been struck. The road itself was not heavily trafficked, and pedestrian use was modest. Miss Stone sued the club and a committee member (Bolton) in negligence and private nuisance. The trial judge found for the defendants (no negligence and no nuisance). The Court of Appeal reversed, holding the defendants liable. The House of Lords allowed the defendants' appeal, restoring the trial judgment and dismissing the action.
Whether the defendants breached their duty of care by failing to take additional precautions against a cricket ball leaving the ground and injuring a passerby when such an event was foreseeable but exceedingly rare; and whether the occasional escape of cricket balls constituted an actionable private nuisance.
A defendant breaches the duty of care only if a reasonable person in the defendant's position would have taken further precautions in light of the risk. Foreseeability of harm is necessary but not sufficient; the probability of harm must be more than a remote possibility. In assessing breach, courts weigh: (1) the likelihood of harm, (2) the gravity of the potential harm, (3) the burden and practicality of additional precautions, and (4) the social utility of the activity. In private nuisance, liability arises where the defendant's use of land unreasonably interferes with the claimant's use or enjoyment, which generally requires a pattern or frequency of interference rather than isolated or extremely infrequent incidents.
No negligence and no nuisance. Although it was foreseeable that a ball might, on rare occasions, leave the ground, the risk was so small that a reasonable person would not have taken additional precautions. The occasional and very infrequent escape of balls did not amount to an unreasonable use of land and so was not an actionable nuisance.
The House of Lords emphasized that breach cannot be established by foreseeability alone; the court must examine the degree of probability that harm would occur. Here, the evidence of only about six balls clearing the boundary over some three decades, with no prior injuries, demonstrated a risk that was very small. The defendants had already taken reasonable precautions by erecting a substantial barrier approximately 17 feet above road level and by situating the pitch a considerable distance from the road. The road was not particularly busy, further reducing the probability that any escaped ball would strike a passerby. Weighing these factors, the Lords concluded that a reasonable person would not have considered further precautions necessary. While the potential harm from a cricket ball striking a person could be serious, the combination of low probability, prior experience without mishap, and the social utility of playing cricket meant the residual risk did not trigger a duty to do more. As to nuisance, the court held that such sporadic and rare incidents did not constitute a continuous or frequent interference with the use and enjoyment of neighboring land or the highway; therefore, no nuisance was established.
Bolton v Stone frames breach as a function of risk assessment, embedding probability into the duty analysis. It instructs that liability does not attach for every foreseeable harm; the risk must be sufficiently likely to warrant additional precautions. The case also draws a line between negligence and nuisance: occasional, isolated escapes are typically insufficient for nuisance. For students, it is a core authority on balancing risk, cost, and social utility, and it provides a counterpoint to cases where small risks nonetheless require simple, inexpensive precautions (e.g., Wagon Mound (No. 2)) or where frequent escapes change the analysis (e.g., Miller v Jackson).
Bolton v Stone teaches that negligence law is not triggered by every imaginable mishap. Even when harm is foreseeable in the abstract, breach depends on whether a reasonable person would treat the risk as sufficiently probable and serious to justify further precautions, considering the costs and practicalities of those measures and the social value of the activity.