United Utilities Water Limited v Northstone (NI) Limited (trading as Farrans Construction)

Summary

The project manager under a water utility's contract issued a payment notice assessing a negative sum and requiring the contractor to pay the utility. An adjudicator upheld the notice, and the utility applied to enforce the award. The contractor answered with a Part 8 claim challenging whether that payment notice was clear and valid, which if successful would have defeated enforcement.

The contractor said these were short points of construction the court could decide on the documents. The utility said interpreting the notice depended on the factual background, including how the parties had used their electronic contract management system after the contract was amended.

Her Honour Judge Kelly declined to decide the Part 8 questions. Construing the notices required evidence of the factual matrix that was not before the court, so the issues were not suitable for Part 8. She granted the utility summary judgment enforcing the award of 3,269,328.05 pounds plus VAT, interest and the adjudicator's fees.

Background and facts

United Utilities Water, a water and wastewater undertaker, engaged a joint venture including Northstone (trading as Farrans Construction) to build cross-country aqueduct and network water mains as part of the West Cumbria Supply Project.

The contract, dated 30 March 2017, used an NEC3 Engineering and Construction Contract, Option C, with bespoke amendments. The prices started at 85 million pounds and were increased by a later settlement and a deed of variation.

The Project Manager issued a payment notice, PA-70, which assessed a negative sum and required Farrans to pay 3,269,328.05 pounds, with a due date of 13 October 2024. The dispute was referred to adjudication, which the utility won: the adjudicator held Farrans liable to pay that sum. The utility applied to enforce the award by summary judgment. Farrans issued Part 8 proceedings seeking declarations that PA-70 was not a valid and clear payment notice, and that, if it was valid, Farrans had not been obliged to serve a pay less notice in order to pay less. If granted, those declarations would have defeated enforcement.

The issue

The question was whether the validity and effect of the utility's payment notice could be decided on a Part 8 claim, or whether its construction depended on evidence of the factual background that was not before the court.

That background included the reasons for the contract amendments and how the parties had operated their electronic contract management system before and after those amendments, which bore on how a reasonable recipient would have read the notices.

The decision

Her Honour Judge Kelly declined to determine the Part 8 issues and granted the utility summary judgment on enforcement.

Interpreting the notices was an exercise in contractual construction, to be carried out against the background known to the parties. She recalled the settled principle:

"No contracts are made in a vacuum; there is always a setting in which they have to be placed."Lord Wilberforce, Reardon Smith Line Ltd v Hansen-Tangen [1976] 1 WLR 989

The parties were sophisticated and were required to act in a spirit of mutual trust and cooperation. Understanding the notices turned on the reasons for and effect of the amendments, and on how the contract management system had been used in practice. The evidence on those matters was insufficient.

"the evidence currently available does not permit this court to determine how a reasonable recipient would have understood the notices."Her Honour Judge Kelly, paragraph 60

She rejected the contractor's argument that, because the amendments were meant to draw a line in the sand, what happened before them was irrelevant. The reasons for and effect of the amendments were central to how a reasonable recipient would read the notices under the new regime.

Because the first Part 8 issue could not be decided, the follow-on issue on the pay less notice could not be decided either. The utility was granted summary judgment enforcing the award of 3,269,328.05 pounds plus VAT, interest as awarded by the adjudicator, and the adjudicator's fees of 62,254.69 pounds plus VAT, with further interest at 8.1 per cent.

Practical implications

Part 8 is not a route for every payment notice dispute. Where the validity of a notice turns on how a reasonable recipient would have understood it, and that depends on the factual background, the court may decline to decide it summarily. The party resisting a smash and grab can defeat a Part 8 challenge by showing that the construction question needs evidence.

The lesson for a party bringing a Part 8 claim is to keep it to genuinely short points that can be decided on the documents and agreed facts. If the argument depends on how the parties operated in practice, or on the background to contract amendments, a Part 8 claim is the wrong vehicle and it will fail.

Evidence of the factual matrix matters. Where a contract has been amended and administered through a project system, be ready to prove how that system was used and what the parties understood, because the meaning of a payment notice can turn on it. A bare assertion that the words speak for themselves will not carry a construction that needs a setting.

For enforcement, the practical result is that an adjudication award stands where the paying party cannot summarily establish a defence. A Part 8 claim that fails to clear the summary threshold leaves the successful party free to enforce.

United Utilities Water Limited v Northstone (NI) Limited (trading as Farrans Construction) [2026] EWHC 1057 (TCC), Technology and Construction Court, Her Honour Judge Kelly sitting as a Judge of the High Court. Judgment handed down 6 May 2026.