S & W Process Engineering Ltd v Cauldron Foods Ltd

Where a construction contract is agreed on an open-book cost-plus basis with target costs, those targets may form an enforceable base cost rather than a mere budgeting aspiration. A contractual mechanism requiring proposed variations and overspends to be discussed and authorised before commitment can control the employer’s liability. Oral agreement at regular project meetings may constitute the operative authorisation, even where a later written certificate is not completed. A quantum meruit is generally unavailable where an existing contract governs payment, or where the contractor cannot establish that additional work was requested or authorised. Implied obligations of satisfactory quality, fitness for purpose and reasonable skill and care may arise, but a separate project-manager standard requires a distinct contractual basis.

The claimant supplied and installed plant and machinery for the defendant’s food-production redevelopment. The claim concerned additional sums said to be payable under a contract evidenced by correspondence, purchase orders and project documents. The defendant disputed the effect of target order values and relied on a contractual cost-control regime. The parties also sought determinations concerning the formation and terms of the contract, variation of the authorisation procedure, the effect of capital-expenditure certificates, implied terms and the possible availability of a quantum meruit.

The court determined preliminary issues concerning whether the target figures controlled expenditure, how additional work and overspends were authorised, and whether the claimant could rely on alternative restitutionary recovery.

1. Contract and target values. The written correspondence, construed against the relevant factual background, evidenced the contract. It was an open-book cost-plus arrangement, but the total target order values of £4,599,108.81 constituted the base cost to the defendant. The targets were an operative part of a mechanism for controlling expenditure, not merely figures for passive monitoring. The later agreed increase produced a revised base figure of £4,655,603.45.
2. Authorisation procedure. Proposed scope increases and overspends had to be discussed before financial commitment, agreed at weekly project review meetings, recorded in the minutes and reflected in the monthly cost reports. The parties’ later abandonment of the Authorisation for Capital Expenditure certificate removed that duplicative written step but did not remove the requirement for prior agreement and authorisation at the meetings.
3. Condition precedent. A signed certificate was not a condition precedent to payment. The relevant commitment arose from the parties’ oral agreement at the weekly meeting, particularly where that agreement was recorded. The claimant would nevertheless have to establish compliance with the agreed procedure, or explain why a claim remained legally and factually sustainable despite non-compliance.
4. Implied terms. The supplied goods had to be of satisfactory quality and, where selected for a particular purpose, fit for that purpose. The works had to be performed with reasonable skill and care. No separate implied term requiring performance with the skill and care of an experienced construction project manager was established.
5. Quantum meruit. In principle, a quantum meruit could not arise for work governed by an existing contract for an agreed payment. It was unlikely to assist with original-scope overspends or additional work lacking proof of instruction, request or authorisation. The court left open the possibility of recovery where additional work was authorised in principle but its expenditure had not been agreed, while indicating that the contractual claim would ordinarily be the primary route.