The Test of Reasonable Foresight -

The Wagon Mound Case

In Overseas Tankship (U.K.) Ltd. v. Morts Dock & Engineering Co. Ltd. (The Wagon Mound No. 1), the Privy Council overruled Re Polemis, holding that liability for negligence depends on the test of reasonable foresight, not the test of directness.
Furnace oil negligently spilled from the Wagon Mound drifted to a nearby wharf, where welding operations later ignited it and destroyed the wharf.
Although the damage was a direct consequence, the Court held the defendants not liable because it was not reasonably foreseeable that furnace oil on water would catch fire.
The Court emphasized that liability is judged by what a reasonable person could foresee before the event, not by hindsight after the damage has occurred.

In Hughes v. Lord Advocate, the House of Lords held that under the test of reasonable foresight, a defendant is liable if the kind or type of damage is foreseeable, even though the exact manner or extent of the damage is not.
In this case, post office workers left an open manhole unattended with lighted paraffin lamps, and an eight-year-old boy suffered severe burns after a lamp fell into the hole and exploded.
Lord Reid held the defendants liable because burn injuries were a foreseeable consequence of leaving open flames accessible to children, even though the explosion and the severity of the burns were unexpected.

In Doughty v. Turner Manufacturing Co. Ltd., the Court applied the test of reasonable foresight established in The Wagon Mound, holding that an employer is not liable where the kind of damage was not reasonably foreseeable.
Workmen negligently dropped an asbestos-cement cover into a cauldron of molten liquid, causing an unexpected chemical explosion that injured the plaintiff.
The Court held that while minor splashing was foreseeable, an explosion was not, as scientific knowledge at the time did not indicate such a reaction.
Therefore, the injury was too remote, and the defendants were not liable.

In S.C.M. (United Kingdom) Ltd. v. W.J. Whittall & Sons, the Court of Appeal applied the test of reasonable foresight, holding the defendants liable after their workers negligently cut a power cable, causing a seven-hour power failure that damaged machinery, ruined materials, and disrupted production at the plaintiff’s factory.
The Court held that such losses were reasonably foreseeable because the defendants knew the cable supplied nearby factories.
It further clarified that while the plaintiff must prove the loss, the court determines the measure and remoteness of damages, without requiring exact mathematical precision.

In Shaikh Gafoor v. State of Maharashtra, canal construction by the State caused water to seep onto the plaintiff’s land, destroying crops and rendering 5 acres uncultivable.
The plaintiff relied on his 7/12 extract to prove cultivation of crops such as bajra, sunflower, and cotton.
Taking judicial notice that local farmers normally grow two crops a year, the Bombay High Court awarded ₹8,000 per acre per year, totaling ₹40,000 annually for the 5 acres.
The Court thus used official land records and local agricultural practice to fairly assess compensation for the plaintiff’s agricultural loss.