A subcontractor's knowledge that a head contract exists and is expected to be profitable is not, without more, sufficient to establish that loss of the head contract was within the reasonable contemplation of the parties under the second limb of Hadley v Baxendale. The disproportion between the subcontract price and the potential liability for loss of the head contract, combined with the head contractor's retained supervisory responsibility, may rebut any inference of an implied undertaking to bear the risk of enhanced damages. The 'not unlikely to occur' test applies to the event giving rise to the loss, not just the type of loss.
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