In Sutton and East Surrey Water Plc v Monarch Chemicals Ltd & Anor [2026] EWHC 1260 (TCC), the Technology and Construction Court considered whether a party that had settled a claim could recover a contribution under the Civil Liability (Contribution) Act 1978 (the "1978 Act"). The case provides important guidance on the doctrine of dual vicarious liability, reinforces the strict requirements of the "same damage" test, and shows the court's willingness to uphold commercial risk allocation in standard term contracts in the context of the Unfair Contract Terms Act 1977 ("UCTA") in commercial supply chains. It deals with multi-party risk allocated in sub-contracted environments and is therefore highly relevant to construction projects.
Background
During a delivery at a water treatment plant owned by Sutton and East Surrey Water plc (“SESW”), the wrong chemical was mistakenly pumped into the system by the driver, triggering a dangerous reaction and the release of chlorine gas into a building, where it accumulated in the roof space and caused significant damage. At the time, the driver was employed by Muztrans (Second Defendant/ Part 20 Defendant), a haulage company, but worked closely under the direction and control of Monarch (First Defendant/ Part 20 Claimant), the chemical supplier. Monarch was responsible for his training and exercised day-to-day control over his work.
The contract governing the relationship between the two defendants (Monarch and Muztrans) was a Contract Hire Agreement, under which Muztrans supplied vehicles and drivers trained in 'pump-over' deliveries. The contract also incorporated the Road Haulage Association (RHA) Conditions of Carriage 2009, which played a key role in the allocation of liability between the parties.
SESW commenced legal proceedings against Monarch and Muztrans for losses of around £6.2 million. Shortly before trial, a settlement was reached and a payment of approximately £5.6 million made by Monarch. SESW discontinued its claim against Muztrans. The trial then continued solely to determine Monarch’s contribution claim against Muztrans under the 1978 Act.
The key issues considered by the Court
The central question to be decided was whether Monarch was entitled to recover a contribution from Muztrans under the 1978 Act which requires both parties to be liable in respect of the 'same damage'.
The key issues for the judge to address were:
- Whether Muztrans owed SESW a duty of care in tort, and if so whether that duty had been breached and caused loss.
- Whether Muztrans was vicariously liable for the negligence of the driver alongside Monarch, engaging the doctrine of dual vicarious liability.
- Whether Muztrans was liable to SESW in respect of the 'same damage' as Monarch.
The first issue was quickly disposed of as no coherent case had been advanced that Muztrans itself owed a duty of care to SESW.
Dual vicarious liability
Monarch argued that both it and Muztrans were vicariously liable for the driver's actions under dual vicarious liability. This proposition was rejected by the judge because the driver was treated as working as part of Monarch’s business at the time.
The key factors considered by the judge were the long term working arrangement with Monarch, use of Monarch's specialised vehicles and equipment, daily operational control exercised by Monarch, and that training and procedures were provided by Monarch. When taken together, Monarch had control over how the work was done. The driver was effectively embedded in Monarch's business, under its control, and using its equipment, training, and systems. Only Monarch was responsible for the driver’s mistake
Muztrans was not vicariously liable for any negligence on the part of the driver jointly with Monarch. Accordingly, Muztrans was not liable to SESW in respect of 'the same damage' as Monarch and the contribution claim failed.
UCTA
In case his primary conclusion on vicarious liability was wrong, the judge then went on to consider whether any liability on the part of Muztrans to make contribution to Monarch was excluded by the contract and the RHA conditions, in particular.
The judge held that the RHA Conditions operated as a comprehensive risk allocation code. He found that the RHA Conditions were properly incorporated into the contract, noting that they were standard industry terms rather than unusual or onerous ones, and were reasonable given the commercial context in which both parties operated.
The judge also held that the relevant terms of the contract between Muztrans and Monarch were reasonable under UCTA 1977, emphasising:
- equal bargaining power;
- industry wide use of RHA Conditions;
- knowledge and course of dealing; and
- availability of insurance.
Had Muztrans been found vicariously liable, the contract terms (RHA Conditions) would have protected Muztrans by limiting liability, requiring claims within one year and shifting risk back to the customer. As a consequence, even if there had been a finding of dual vicarious liability, Muztrans would likely still not have had to pay a contribution.
Key Takeaways
The judgment has important implications for complex multi-party construction disputes. It underscores the difficulty of pursuing contribution claims under the 1978 Act, particularly given the strict 'same damage' requirement, and reinforces the importance of clear contractual risk allocation.
The TCC emphasised that operational control, rather than formal employment status, is central to determining vicarious liability. Parties who exercise day-to-day control over works on site are more likely to bear responsibility, regardless of contractual labels. Importantly, the court will look beyond the contractual framework and examine how the works were actually carried out in practice. This makes contemporaneous evidence of site control, supervision, and decision-making critical in disputes.
The decision also confirms that commercially agreed terms will generally be upheld under UCTA, particularly in standard industry forms. Courts are reluctant to interfere with agreed risk allocation between commercially sophisticated parties.
