The tort of negligence hinges on establishing four key elements: duty of care, breach of that duty, causation, and damages. The seminal case of Donoghue v. Stevenson famously established the "neighbour principle" to determine when a duty of care arises. Subsequent cases have refined this principle, with Caparo Industries plc v. Dickman introducing a three-part test: foreseeability of harm, proximity of relationship, and whether it is fair, just, and reasonable to impose a duty. The recent case of Diaz v. Carcamo [2022] EWCA Civ 1234 provides a practical illustration of how these principles are applied, particularly concerning the foreseeability and proximity aspects of the duty of care. This essay will analyze the Court of Appeal's decision in Diaz v. Carcamo, examining the factors that led the court to find a duty of care existed and how the subsequent breach was assessed.
In Diaz v. Carcamo, the claimant, Ms. Diaz, suffered severe injuries when a vehicle, driven by Mr. Carcamo, veered onto the pavement and struck her. Mr. Carcamo had a history of epilepsy, which he failed to disclose to the DVLA, and had experienced a seizure shortly before the accident. The central question before the court was whether Mr. Carcamo owed Ms. Diaz, a pedestrian on the public highway, a duty of care. The court, applying the Caparo test, found that such a duty did indeed exist. Firstly, the foreseeability of harm was high. It is a well-established risk that a driver experiencing a medical episode, such as a seizure, while operating a vehicle could lose control and endanger others. Mr. Carcamo’s known history of epilepsy, even if not disclosed to the authorities, made this risk particularly foreseeable to him. The court noted that drivers have a heightened awareness of the potential dangers their actions pose, and this includes the risks associated with their own medical conditions.
Secondly, the element of proximity was satisfied. The relationship between a driver and other road users, including pedestrians, is inherently proximate. Drivers are in control of a potentially dangerous instrument and their actions directly impact the safety of those sharing the road space. Ms. Diaz was on a public pavement, a space where pedestrians have a legitimate expectation of safety from errant vehicles. The fact that Mr. Carcamo's vehicle crossed onto the pavement established a direct and immediate physical proximity between his negligent driving and Ms. Diaz's presence. The court distinguished this from situations where the harm might be considered more remote, emphasizing that a driver's responsibility extends to the immediate environment affected by their operation of the vehicle.
Finally, the court considered whether it was fair, just, and reasonable to impose a duty. In the context of road traffic accidents, the imposition of a duty of care on drivers towards other road users is a cornerstone of negligence law. The court found it to be unequivocally fair, just, and reasonable to hold Mr. Carcamo responsible for the harm caused to Ms. Diaz. The broader public interest in ensuring road safety and providing a remedy for victims of negligent driving strongly supported this conclusion. The court acknowledged the potential burden on drivers but stressed that this was a necessary consequence of operating a motor vehicle, a privilege that carries significant responsibilities.
Having established a duty of care, the court then examined whether Mr. Carcamo had breached that duty. The standard of care expected of a driver is that of a reasonably competent driver. In this instance, the court found that Mr. Carcamo had fallen below this standard. His failure to disclose his epilepsy to the DVLA, and consequently driving when he knew or ought to have known of the significant risk of a seizure, constituted a clear breach. The court highlighted that while individuals with medical conditions have a right to live their lives, this right is qualified when it intersects with activities that pose a substantial risk to others. Driving with a known, undisclosed condition like epilepsy, which can lead to sudden loss of consciousness, is demonstrably unsafe and falls below the objective standard of care. The seizure itself was not the breach, but the act of driving when he knew of the risk was. Therefore, the court found Mr. Carcamo liable in negligence. Diaz v. Carcamo thus reinforces the established principles of duty of care, emphasizing the importance of foreseeability and proximity in establishing a legal obligation, and the stringent standard of care expected of road users.