Issue. Bond has breached by building the pool to the wrong depth. The issues are: (i) the measure of damages (cost of cure vs loss of amenity); (ii) remoteness of the two consequential losses; (iii) the effect of mitigation; and (iv) whether any equitable remedy is available.
Rule. Damages aim to put Lakeside in the position as if the contract had been performed (Robinson v Harman). Where the cost of cure is wholly disproportionate to the benefit, the court may award loss of amenity instead (Ruxley Electronics v Forsyth). Remoteness limits recovery to loss arising naturally (limb 1) or within the parties' reasonable contemplation through special knowledge (limb 2) (Hadley v Baxendale; The Heron II). The claimant must mitigate (British Westinghouse v Underground Electric). Equitable remedies are discretionary and available only where damages are inadequate.
Application — measure (cost of cure vs loss of amenity). Rebuilding would cost £30,000, yet the pool is safe and usable and the diminution in value is nil. This is directly analogous to Ruxley v Forsyth, where a pool built shallower than specified did not justify the disproportionate rebuild cost; the House of Lords awarded a modest loss of amenity sum. Lakeside is therefore unlikely to recover the £30,000 cost of cure and will receive a modest loss-of-amenity award reflecting its disappointed expectation.
Application — remoteness of consequential losses. The £12,000 sponsorship depended on the exact specification and Bond knew about it; it therefore falls within limb 2 of Hadley v Baxendale (loss within the parties' contemplation through special knowledge) and is recoverable, much as the foreseeable ordinary losses were in Victoria Laundry v Newman Industries. The £40,000 confidential investor deal, by contrast, was unknown to Bond; under limb 2 it is too remote because Bond had no special knowledge of it (the position of the secret lucrative contracts in Victoria Laundry), and it is not a 'not unlikely' ordinary consequence (The Heron II). So the £40,000 is irrecoverable.
Application — mitigation. Lakeside refused a reasonable cheap remedy offered by Bond. Under British Westinghouse, a claimant cannot recover losses that reasonable mitigation would have avoided. Refusing a reasonable offer to cure may itself be a failure to mitigate, reducing any recoverable loss flowing from the uncured defect; the duty is one of reasonableness.
Application — equitable remedies. Specific performance to compel Bond to rebuild is unlikely: it is a building contract requiring supervision, and where damages (loss of amenity) adequately address the modest real loss, equity will not intervene. The 'unique waterfront plot' does not change this, because the issue is defective performance, not a refusal to convey unique land.
Conclusion. Lakeside should recover a loss-of-amenity sum, not the £30,000 cost of cure (Ruxley); the £12,000 sponsorship is recoverable (limb 2 — Bond knew) but the £40,000 investor loss is too remote (limb 2 fails — Bond did not know; The Heron II); and any award may be reduced for Lakeside's refusal of a reasonable cure (British Westinghouse). Specific performance to rebuild is unlikely (supervision; damages adequate for the real loss).