Key lessons from United Utilities Water Ltd v Northstone (NI) Ltd
May 2026The TCC’s decision in United Utilities Water Ltd v Northstone (NI) Ltd (t/a Farrans Construction)¹ highlights the court’s firm approach to adjudication enforcement and the importance of getting payment procedures right.
Key takeaways
- The TCC enforced an adjudicator’s award requiring Farrans to pay £3.27 million to United Utilities.
- The dispute centred on whether a payment notice issued under a heavily amended NEC3 contract was valid and triggered a payment obligation from the contractor to the employer.
- The contractor sought to resist enforcement via Part 8 proceedings, arguing that the payment notice was invalid and that no pay less notice was required.
- The TCC held that the issues were unsuitable for Part 8 proceedings since they depended on factual context, which included the amended payment regime agreed between the parties.
- Summary judgment was granted, reinforcing the TCC’s robust approach to adjudication enforcement and the limits of Part 8 challenges.
Background
The employer, United Utilities Water Ltd (United Utilities), engaged a joint venture contractor comprising Northstone (NI) Ltd (trading as Farrans Construction) (Farrans) and Roadbridge Limited under an amended NEC3 ECC Option C contract entered into in 2017. Following various compensation events and disputes, the contract was amended by a 2018 Settlement Agreement and a 2021 Deed of Variation, increasing its value to £131.6 million and introducing significant commercial changes.
Central to the parties’ dispute was a bespoke payment mechanism which departed from the standard NEC3 structure. The regime moved from a target cost model to a milestone-based approach, with an accelerated payment cycle (15 days rather than 35 days) and the ability to submit multiple applications per month. The amended contract also expressly allowed for payments in either direction, including sums payable by the contractor to the employer.
Under this regime, the Project Manager assessed the “amount due”, including deductions and sums payable by the contractor. Where the assessed sum was negative, the amended contract provided for payment to be made by the contractor to the employer. Any pay less notice had to be served within strict time limits, in this case, effectively within one day.
The payment dispute
On 4 October 2024, the contractor submitted applications for payment in respect of two milestones via CEMAR (a cloud-based contract administration platform). This was under a single communication to CEMAR. The Project Manager accepted that one milestone had been achieved but rejected the other.
On 11 October 2024, the Project Manager issued payment notice PA‑70, assessing a negative amount due of £3,269,328.05. This reflected sums payable by the contractor, including deductions and retained amounts.
The contractor responded by issuing a communication with a purported pay less notice on 17 October 2024, received the next day, asserting that the sum due was £0. This was indicated as pursuant to the contract and without prejudice to the contractor’s position that no payment reduction notice was required. United Utilities contended that the notified sum became due following the issue of the payment notice, with a final date for payment of 19 October 2024, and that the pay less notice had therefore been served out of time and was invalid.
Adjudication and proceedings
United Utilities commenced adjudication and was successful, with the adjudicator ordering Farrans to pay £3.27 million, together with VAT, interest and fees. Farrans did not comply with the decision.
United Utilities commenced enforcement proceedings and applied for summary judgment. The enforcement proceedings were amended to name Farrans as the only defendant. Farrans had initially asserted that there had been a breach of natural justice by the adjudicator. Farrans then responded by issuing Part 8 proceedings, contending that PA‑70 was invalid and, in any event, that it was not required to issue a pay less notice.
Issues in dispute
Issue 1 – Validity of PA-70
Farrans challenged the validity of PA‑70 on three grounds. First, it argued that the payment notice was invalid because incorrect payment dates were shown on CEMAR. Second, it said the notice was unclear and ambiguous, particularly given the very short timeframe for any response under the accelerated payment regime. Third, Farrans contended that certifying a negative sum did not clearly amount to a demand for payment from the contractor to the employer.
United Utilities rejected those arguments, maintaining that payment notices must be interpreted objectively, by reference to how a reasonable recipient, with knowledge of the contractual and factual context, would have understood the notice. That context included the bespoke payment regime, the parties’ shared understanding of CEMAR’s limitations, and the express contractual provision for contractor‑to‑employer payments.
Issue 2 – Pay less notice requirement
Farrans argued that, even if PA‑70 was valid, it was not required to issue a pay less notice to resist payment.
United Utilities disagreed, relying on the statutory regime under the Housing Grants, Construction and Regeneration Act 1996 (as amended) (HGCRA) under which the notified sum must be paid unless a valid pay less notice is served within the required timeframe.
Procedural issue – suitability for Part 8
United Utilities contended that the disputes were fact‑sensitive, requiring consideration of contractual background and evidence as to how the revised payment regime operated in practice. By contrast, Farrans maintained they were short points of law suitable for Part 8 proceedings.
The TCC’s Decision
The TCC held that the issues raised by Farrans were not suitable for determination under Part 8, because interpretation of PA‑70 required consideration of the wider factual matrix. That context included the commercial purpose of the contractual amendments, the operation of the accelerated payment regime, the use and known limitations of CEMAR, and the parties’ shared knowledge and working practices. It was relevant that the contracting parties were experienced and required to act in line with the NEC’s spirit of mutual trust and cooperation.
In emphasising the importance of context, the TCC drew on established authority recognising that contractual interpretation must take place against the relevant factual background².
The TCC found that Farrans had adduced insufficient evidence concerning how CEMAR operated in practice, what the parties understood, and the background to the amended payment regime. As a result, it was not possible to determine how a “reasonable recipient “circumstanced as the parties were”” would have interpreted the notice.
Given the failure of the Part 8 challenge (with these issues transferred for full trial), United Utilities was entitled to summary judgment enforcing the adjudicator’s decision, including the principal sum, interest and the adjudicator’s fees.
Observations
There have been several recent cases on whether errors or deficiencies in a notice render it invalid. This judgment reinforces that the validity of payment and pay less notices is highly fact‑sensitive, as well as the importance of complying with the payment regime. The courts will adopt a “reasonable recipient” in context approach, and technical arguments, such as incorrect dates or formatting issues, are unlikely to succeed in isolation. The Court made clear that errors arising from automated contract administration platforms will not necessarily invalidate a notice where the broader contractual and operational context clarifies its meaning and the parties were aware of, and accepted, the system’s limitations.
The decision highlights the risks associated with heavily bespoke NEC3 amendments. Payment regimes that depart from standard NEC structures can create complexity in contractual administration or uncertainty around notice interpretation and may significantly compress statutory timelines, increasing the risk of non‑compliance. Parties should therefore understand and ensure close alignment between contract terms and payment administration systems. This is particularly important in the event where commercial terms are subsequently updated by the parties during project delivery.
Although not finally determined, the judgment indicates that NEC3 contracts (as amended) can validly provide for payments from contractor to employer, and that a negative amount due may trigger payment obligations, subject to proper notice compliance. The consequences of the contractor having just one day in order to issue its pay less notice was not decided. Contractors should treat such notices as potentially engaging section 111 of the HGCRA and ensure that any required pay less notice is served in time and in accordance with the applicable statutory and contractual requirements.
Finally, the case underlines the narrow scope of Part 8 challenges in adjudication enforcement. Part 8 is only appropriate for short, self‑contained questions of law. Where interpretation depends on commercial context, course of dealing or system usage (as with CEMAR here), the court is likely to refuse to engage. Consistent with established TCC authority, attempts to resist enforcement on technical or procedural grounds face a high bar, and where a Part 8 claim fails, summary judgment will follow swiftly to preserve cashflow certainty under the HGCRA regime.
For contractors and consultants, this case underscores the importance of reviewing any amendments to industry standard forms of contract, strict compliance with payment and pay less notice provisions, careful scrutiny of system‑generated data, and a realistic assessment of whether a dispute is genuinely suitable for Part 8 before deploying it as a defence to adjudication enforcement.
If you wish to discuss any of the information covered above, please contact James Vernon or the authors.
¹United Utilities Water Ltd v Northstone (NI) Ltd (t/a Farrans Construction) [2026] EWHC 1057 (TCC)
²Reardon Smith Line Ltd v Hansen-Tangen [1976] 1 WLR 989
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