Factual and Procedural Background
On Saturday 8 October 1988, an explosion occurred at the Plaintiff's industrial works in The City, causing significant damage to a heat exchanger and resulting in substantial economic loss due to lost production. The heat exchanger, installed approximately 20 months earlier with an expected lifespan of 20 years, was part of a plant supplied by Company A through a main contractor, but the Plaintiff's claim against Company A was time-barred. Instead, the Plaintiff pursued contractual warranty claims against the 1st Defendant, a sub-contractor responsible for the heat exchanger's design and manufacture, alleging breaches in design, material selection, and workmanship.
The Plaintiff also amended the claim to include the 2nd Defendant, who performed engineering repairs and maintenance on the heat exchanger. A leak discovered in August 1988 led to a repair by the 2nd Defendant, which was defective and failed to address the full extent of a crack. Despite a failed hydraulic pressure test, the Plaintiff's engineers returned the heat exchanger to service without conducting recommended non-destructive testing, which would have revealed the crack's extent. The explosion was ultimately attributed to this crack and the Plaintiff's failure to ensure proper repair and testing.
The trial commenced before Judge Bowsher QC, sitting as an Official Referee, in February 1992. The Plaintiff initially claimed damages arising from the explosion, including repair costs and loss of profits. During trial, the Plaintiff sought to amend the claim to include damages on an alternative basis, assuming the repair weld was a novus actus causing or contributing to the explosion, entitling the Plaintiff to damages for repair costs and consequential losses regardless of the explosion. The Judge granted leave to amend but ordered the Plaintiff to pay the costs occasioned by the amendment.
At trial's conclusion, the Judge found the 1st Defendant breached warranty due to latent defects reducing the heat exchanger's lifespan, and the 2nd Defendant breached contract by failing to fully repair the crack. However, the explosion was caused by the Plaintiff's recklessness in failing to conduct appropriate testing before resuming operation. Consequently, claims against the 2nd Defendant and the 1st Defendant’s original claim for explosion damages were dismissed, but the Plaintiff was awarded damages against the 1st Defendant under the amended claim for repair costs and consequential losses.
The 1st Defendant appealed, challenging the grant of leave to amend, the legal basis for recovery of hypothetical lost profits, and the costs order. The Plaintiff cross-appealed on costs related to the 2nd Defendant. The appellate court considered these issues and the admissibility of further evidence regarding costs and insurance.
Legal Issues Presented
- Whether the trial judge erred in granting leave to amend the Plaintiff's claim to include an alternative basis for damages after trial commencement.
- Whether the Plaintiff is entitled to recover damages for hypothetical lost profits and consequential losses that were not actually incurred due to a supervening event (the explosion).
- The appropriate allocation of costs between the parties, particularly in light of the late amendment and its impact on the 1st Defendant.
Arguments of the Parties
1st Defendant's Arguments
- The amendment allowing the alternative claim was made too late, prejudicing the 1st Defendant who was trial-ready and would require a significant adjournment to meet the new case.
- The Plaintiff is not entitled as a matter of law to damages for hypothetical lost profits that were not actually incurred due to the explosion.
- The costs order was unfair; the 1st Defendant should have been awarded costs up to the amendment date and a substantial portion thereafter, given the hardship caused by the late amendment and lack of opportunity to mitigate costs through payment into court or Calderbank offer.
- Further evidence regarding the quantum of costs and the 1st Defendant’s insurance position should be admitted to demonstrate prejudice.
Plaintiff's Arguments
- The alternative claim was properly pleaded and necessary to avoid injustice under the Henderson v. Henderson doctrine, preventing re-litigation of the same cause.
- The Plaintiff did not require leave to amend as the alternative claim was encompassed within the original claim.
- The 1st Defendant should pay the costs of the 2nd Defendant either directly or indirectly, as the Plaintiff only joined the 2nd Defendant due to the 1st Defendant blaming them.
- The Plaintiff relied on authorities supporting recovery of damages for loss of profit on a hypothetical basis, despite the supervening event.
Table of Precedents Cited
| Precedent |
Rule or Principle Cited For |
Application by the Court |
| Henderson v. Henderson [1843] 3 Hare 100 |
Doctrine preventing re-litigation of matters that could have been raised earlier without special circumstances. |
Supported allowing the Plaintiff's late amendment to avoid injustice and preclude a separate future claim. |
| Talbot v. Berkshire County Council [1993] 3 WLR 708 |
Reinforcement of Henderson v. Henderson principle. |
Used to justify amendment allowing alternative claim on same subject matter. |
| The Glenfinlas [1917] |
Damages for loss of profit during repair period not recoverable if repairs are never carried out due to supervening event. |
Distinguished to show loss must be actual or likely to occur; hypothetical loss not recoverable if prevented by unrelated event. |
| The Kingsway [1918] P 344 |
Future loss of profit recoverable if repairs are to be done and loss is likely. |
Distinguished from Glenfinlas; loss recoverable only if repairs and detention actually occur. |
| Carslogie Steamship Co. Ltd. v. Royal Norwegian Government [1952] AC 292 |
Loss of profit during repair period not recoverable if vessel was unseaworthy due to unrelated damage; time sequence irrelevant if one casualty renders vessel unseaworthy. |
Applied to limit damages to actual loss incurred; hypothetical loss not recoverable if supervening event prevents profitable use. |
| Jobling v. Associated Dairies Ltd. [1982] AC 794 |
Damages for loss of earnings not recoverable after occurrence of unrelated illness preventing employment. |
Applied to support principle that supervening events unrelated to defendant's breach limit recoverable damages. |
| Smith, Hogg & Co. v. Black Sea and Baltic Insurance [1940] AC 997 |
Rejection of legal significance of "causa sine qua non" in causation analysis. |
Supported approach focusing on practical causation rather than Latin distinctions. |
| Schering Agrochemicals Ltd. v. Resibel N.V.S.A. (unreported, 1991-1992) |
Recovery of damages for hypothetical loss of production despite supervening fire; chain of causation broken by Plaintiff's negligence. |
Found unpersuasive and per incuriam; not followed due to lack of argument and uncertainty over appeal outcome. |
| Kaines (U.K.) Ltd. v. Osterreichische [1993] 2 LLds 1 |
Costs allocation where amendment is made; special reasons may justify departure from general rule. |
Referenced in relation to costs discretion and whether amendment justifies costs order. |
| Anglo-Cyprian Trade Agencies v. Paphos Wine Industries [1951] 1 AER 873 |
Costs awarded to Defendant where Plaintiff made late amendment substantially altering claim. |
Used to support 1st Defendant’s entitlement to costs up to amendment date. |
| Alltrans Express v. CVA Holdings [1984] 1 WLR 394 |
Costs awarded to Defendant as successful party despite no payment into court. |
Supported principle that the successful party is entitled to costs even absent payment into court. |
| Lipkin Gorman v. Karpnale [1989] 1 WLR 1340 |
Costs awarded to Defendant down to amendment date and partial costs thereafter where Plaintiff succeeded only on minor claim. |
Applied to support apportionment of costs reflecting relative success of parties. |
Court's Reasoning and Analysis
The Court exercised deference to the trial judge's discretion in granting leave to amend, finding no error in principle or unfair balancing of factors. It emphasized the importance of allowing amendments to enable full determination of issues, provided prejudice is compensable by costs orders. The Court acknowledged hardship to the 1st Defendant but found the costs order adequate to protect against injustice. The Court also stressed the injustice to the Plaintiff if barred from pursuing a valid alternative claim due to procedural omission, referencing the Henderson v. Henderson doctrine.
Regarding the 1st Defendant's insurance position, the Court held that since the Defendant did not request reconsideration of the amendment based on insurance prejudice at trial, the issue was not properly before the Court. It further noted that insurance coverage complexities are common and do not justify denying amendments.
The Court rejected the Plaintiff's contention that the alternative claim was encompassed in the original pleading, finding the amendment substantively different and necessary for clarity.
On the legal question of recovering hypothetical lost profits where a supervening event prevents actual loss, the Court analyzed relevant tort authorities and analogous contract principles. It concluded that damages for loss of profit are recoverable only if the loss would have been actually incurred but for the breach. If a supervening event unrelated to the Defendant's breach prevents the loss, damages for hypothetical loss are not recoverable. The Court applied this principle to limit the Plaintiff's recoverable damages to repair costs and actual losses incurred from the date of the crack discovery.
The Court found the Schering case unpersuasive due to its procedural deficiencies and lack of comprehensive argument. It rejected the Plaintiff's argument based on failure to mitigate and causation, affirming the trial judge's findings on causation and responsibility.
On costs, the Court held that the trial judge erred in principle by ordering the Plaintiff to pay the 1st Defendant's costs of the entire action except those attributable to damages. The Court emphasized the general rule that a Defendant facing a late amendment that substantially alters the claim is entitled to costs up to the amendment date, with potential apportionment thereafter. The Court found no special reason to depart from this rule and considered the 1st Defendant's inability to make a payment into court or Calderbank offer due to the late amendment. The Court awarded the 1st Defendant 85% of its costs after the amendment date, reflecting the modest success of the Plaintiff.
The Court declined to admit further evidence on costs estimates and insurance as unnecessary, noting awareness of the case's complexity and expense.
Finally, the Court dismissed the Plaintiff's cross-appeal on costs, agreeing with the trial judge that no order should be made requiring the 1st Defendant to reimburse the Plaintiff for the 2nd Defendant's costs, given the Plaintiff's failure against both Defendants on the explosion claim.
Holding and Implications
The Court ALLOWED the 1st Defendant's appeal and DISMISSED the Plaintiff's cross-appeal. It directed that the assessment of damages be limited to the cost of replacing the defective casing of the heat exchanger and any losses incurred on and after 24 August 1988 due to loss of production while the repair was effected. The Court discharged the previous costs order and ordered that the Plaintiff pay the 1st Defendant's costs up to the amendment date (24 February 1992) and 85% of the costs thereafter.
The direct effect of this decision is to restrict the Plaintiff's recoverable damages to actual losses rather than hypothetical lost profits prevented by the explosion, and to adjust the costs liability in recognition of the prejudice caused by the late amendment. No new legal precedent was established beyond the application and affirmation of existing principles regarding amendments, causation, and damages assessment.