Overseas Tankship (UK) Ltd v Morts Dock & Engineering Co Ltd (The Wagon Mound No 1) [1961] UKPC 2

Oil negligently discharged from the appellants' ship spread across Sydney Harbour and ignited, destroying the respondents' wharf. The Privy Council held that liability in negligence depends on whether the damage was reasonably foreseeable, overruling the 'direct consequences' test in Re Polemis. This established foreseeability as the test for remoteness of damage.

Facts

The appellants were charterers of a vessel, the Wagon Mound, which was moored at a wharf in Sydney Harbour. Due to the carelessness of their servants, a large quantity of bunkering oil (furnace oil) was discharged into the harbour. The oil spread across the water to the respondents’ wharf approximately 600 feet away, where welding and repair work was being carried out on other vessels. Some cotton waste or rag floating on the oil ignited from welding sparks, causing a fire that severely damaged the respondents’ wharf and equipment. The trial judge found that the appellants did not know and could not reasonably have been expected to know that furnace oil spread on water was capable of being set alight.

Minor Damage

Apart from fire damage, the respondents suffered minor damage from oil congealing on their slipways, which was direct and foreseeable but insignificant compared to the fire damage.

Issues

The principal issue was whether the appellants were liable for damage caused by fire when such damage was not reasonably foreseeable, even though some damage (oil fouling) was foreseeable as a direct consequence of the negligent act. This required the Privy Council to consider whether the rule in Re Polemis, which imposed liability for all direct consequences of negligence regardless of foreseeability, remained good law.

Judgment

The Privy Council, delivering judgment through Viscount Simonds, held that the rule in Re Polemis should no longer be regarded as good law. Their Lordships determined that liability in negligence should be based on whether the damage was of a kind that a reasonable person should have foreseen.

The judgment reviewed the authorities leading to Re Polemis and those following it, noting significant departures from and criticisms of that rule in subsequent cases including Glasgow Corporation v Muir, Bourhill v Young, and Woods v Duncan. Their Lordships observed that the proposition that foreseeability goes to culpability but not to compensation was fundamentally false.

Their Lordships reasoned that there can be no liability until damage has been done, and tortious liability is founded on the consequences of the act, not the act itself. If liability depends on reasonable foreseeability of consequent damage, this must be determined by reference to the damage that actually occurred. If that damage is unforeseeable, liability cannot be established.

The judgment emphasised that it does not seem consonant with current ideas of justice or morality that for an act of negligence, however slight or venial, which results in some trivial foreseeable damage, the actor should be liable for all consequences however unforeseeable and however grave, so long as they can be said to be direct.

Implications

Establishment of the Foreseeability Test

This decision established that reasonable foreseeability is the controlling test for remoteness of damage in negligence. A defendant is only liable for damage of a kind that was reasonably foreseeable at the time of the negligent act.

Overruling of Re Polemis

The ‘direct consequences’ test from Re Polemis was definitively rejected. The Privy Council held that substituting ‘direct’ for ‘reasonably foreseeable’ consequences led to conclusions both illogical and unjust.

Harmonisation of Principles

The decision sought to harmonise the law of negligence with the contractual remoteness principles from Hadley v Baxendale, noting the anomaly that different tests would apply depending on whether a claim was framed in contract or tort.

Continuing Significance

The Wagon Mound remains the leading authority on remoteness of damage in tort, establishing that a tortfeasor is responsible for the probable consequences of their act as judged by the standard of the reasonable person. The test of foreseeability corresponds with what their Lordships described as the common conscience of mankind.

Verdict: Appeal allowed. The respondents’ action for damage caused by negligence was dismissed. The issue of nuisance was remitted to the Full Court for further consideration. The respondents were ordered to pay the appellants’ costs.

Source: Overseas Tankship (UK) Ltd v Morts Dock & Engineering Co Ltd (The Wagon Mound No 1) [1961] UKPC 2