Castle Water Ltd v Thames Water Utilities Ltd

Factual and Procedural Background

This judgment concerns disputes about disclosure heard remotely at the second Case Management Conference (CMC) on 19 and 20 May 2020. The background involves a commercial transaction whereby the Plaintiff acquired the Defendant's non-household water and sewerage retail business pursuant to two agreements executed on 18 July 2016, collectively referred to as the Transfer Agreement and the Operating Agreement. This acquisition was in anticipation of the liberalisation of the non-household water market in England on 1 April 2017. The consideration paid was £100 million. The agreements required the transfer of customer data and operational information from the Defendant to the Plaintiff.

Subsequently, disputes arose leading to litigation involving claims and counterclaims each in the region of £40 million. The parties have engaged experienced legal representation and extensive resources in the litigation. Procedurally, the court ordered a split trial: Stage 1 to address the Defendant’s alleged breaches and principle issues regarding recoverability of loss; Stage 2, if necessary, will address factual causation, proof of loss, and contributory negligence or mitigation issues.

The parties produced a jointly agreed List of Issues for the Stage 1 trial and a largely agreed List of Issues for Disclosure pursuant to Practice Direction 51U (PD51U). However, some disclosure issues remained unresolved, necessitating this judgment. The core disputes arise from differing interpretations of the scope of disclosure obligations under PD51U, with the Plaintiff advocating a broader approach than the Defendant.

Legal Issues Presented

1. What expectations were shared by the parties and existed within the industry at the time of entering the Transfer and Operating Agreements as to the completeness and accuracy of the customer data to be transferred?
2. As at the Transfer Date, were there any industry standards and practices regarding when data would be considered reasonably complete and accurate, and if so, what were they?
3. What systems, controls, policies, or plans did the Defendant put in place, consider, or intend to put in place to ensure the completeness and accuracy of Customer Data prior to transfer?
4. What information in specified categories did the Defendant own or control but fail to transfer completely and accurately to the Plaintiff on the Transfer Date?
5. What data improvement processes did the Defendant have or consider after the data transfers until 7 July 2017 and thereafter?
6. Did the Defendant know or have information before the Transfer Date that certain debt balances provided to the Plaintiff included debts unlikely to be recovered, including statute barred, disputed, or insolvent accounts?
7. What meter read skip rate is consistent with Good Industry Practice?

Arguments of the Parties

Plaintiff's Arguments

• The Plaintiff asserts that there were industry standards and practices relating to data completeness and accuracy that form part of the factual matrix of the contracts.
• The Plaintiff contends that the Defendant, as a major water industry participant, is likely to possess documents evidencing internal and external discussions about such standards, beyond publicly available information.
• The Plaintiff argues for Model C disclosure (focused, narrow disclosure) for key issues related to industry standards, practices, and data accuracy.
• Regarding data transfer completeness, the Plaintiff insists on disclosure of “known adverse documents” beyond those expressly identified in the pleadings, given ongoing discovery of inaccuracies post-transfer.
• The Plaintiff submits the Defendant’s knowledge of unreliable debt data prior to transfer is material and requires disclosure.
• For meter read skip rates, the Plaintiff requests documents evidencing industry standards and data on skip rates relevant to Good Industry Practice.

Defendant's Arguments

• The Defendant contends that relevant expectations and standards are limited to publicly available information and documents already shared between the parties.
• It denies the existence of formal or published industry standards on data accuracy and claims the benchmark was simply adequacy for Market Opening.
• The Defendant proposes Model B disclosure (more limited) for the issues concerning industry standards and practices.
• The Defendant resists extending disclosure obligations to unidentified data categories, arguing that disclosure should be limited to pleaded issues and known adverse documents related only to those.
• The Defendant characterises its obligation to disclose known adverse documents as requiring reasonable and proportionate checks, not continuous or unlimited scrutiny.
• Regarding meter read skip rates, the Defendant submits that only published standards and data should be disclosed, noting it is unaware of any published standards on skip rates consistent with Good Industry Practice.

Table of Precedents Cited

Court's Reasoning and Analysis

The court began by reviewing the principles governing disclosure under PD51U, emphasizing the overriding objective of ensuring disclosure is reasonable and proportionate, focused on issues in dispute, and limited in scope to avoid unnecessary burden and cost. It highlighted the importance of identifying "Issues for Disclosure" that correlate with contested issues in the trial, driven by the relevance of documents in the parties' possession.

The court addressed the obligation to disclose "known adverse documents," clarifying that parties must take reasonable and proportionate steps to check for such documents, including inquiries beyond simply asking senior personnel. The court distinguished between searches and checks, noting that while searches involve active investigation, checks require reasonable inquiries to identify documents already known to the party.

Applying these principles, the court considered each disputed Issue for Disclosure. For Issue 1, concerning shared and industry expectations of data completeness and accuracy, the court accepted that extended (Model C) disclosure was justified given the importance of the issue and the likelihood that the Defendant possessed relevant internal and external documents beyond published standards. However, the court found the Plaintiff’s initial requests too broad and unfocused, requiring narrowing to specific categories of documents linked to industry standards and practices.

For Issue 2, the court agreed that the Defendant should disclose published standards and documents evidencing industry practices as of the Transfer Date, but rejected overly broad requests for all documents merely "referring to" standards.

On Issue 3 and Issue 7, relating to the Defendant’s systems, controls, and data improvement processes, the court endorsed inclusion of language covering considered or intended steps, given their potential relevance to negligence or breach of duty claims.

Regarding Issue 4, the court accepted the Plaintiff’s proviso requiring disclosure of known adverse documents beyond those expressly identified in the pleadings, rejecting the Defendant’s arguments that this would impose an unlimited obligation or extend beyond pleaded issues. The court clarified that the Defendant’s obligation is to conduct reasonable and proportionate checks and disclose known adverse documents accordingly.

For Issue 17, concerning the Defendant’s knowledge of unreliable debt data, the court preferred the Plaintiff’s broader formulation, recognizing the materiality of the Defendant’s knowledge to the claim and the necessity of disclosure of relevant documents.

On Issue 36, about meter read skip rates consistent with Good Industry Practice, the court found the Plaintiff’s request too broad and the Defendant’s too narrow. It directed the parties to agree on appropriate entities for document requests and ordered disclosure analogous to that ordered for Issue 2.

Overall, the court balanced the need for disclosure to enable a fair trial with the imperative to avoid disproportionate burdens, tailoring the scope of disclosure to the contested issues and the likelihood of relevant documents.

Holding and Implications

The court GRANTED extended disclosure (Model C) in respect of key issues relating to industry standards, practices, and data accuracy, subject to narrowing of the Plaintiff’s requests to focused categories of documents. It upheld the Plaintiff’s entitlement to disclosure of known adverse documents beyond those expressly pleaded but limited by the obligation to conduct reasonable and proportionate checks. The court rejected the Defendant’s narrower approach to disclosure and its objections to the Plaintiff’s proposed provisos.

The decision ensures that the parties will engage in disclosure sufficient to fairly resolve the complex factual disputes central to the litigation, particularly regarding the completeness and accuracy of transferred customer data and related industry standards. No new legal precedents were established; rather, the ruling applies established principles of PD51U disclosure in a complex commercial context, emphasizing proportionality and focus in disclosure obligations.