Background
The plaintiff sought a declaration that an instruction dated 8 January 2019 to commence Phase B works under a construction contract was valid and binding. The contract, dated 14 August 2017, provided for construction of a children’s hospital at St. James’s Hospital campus in Dublin 8, divided into Phase A (basement and substructure) and Phase B (superstructure and remaining works). The defendant BAM Building Limited disputes the validity of the Phase B Instruction, contending that contractual preconditions were not satisfied when the instruction was issued.
A central issue emerged during discovery: Clare White, a director of O’Connell Mahon Architects, signed the Phase B Instruction as Employer’s Representative, but documents revealed she was not formally appointed to that role until 8 August 2023—four years and seven months after issuing the instruction. The defendant amended its defence to challenge White’s authority to issue the instruction. An earlier order on 21 March 2024 required the plaintiff to make initial discovery; subsequent amendments to the pleadings prompted a Second Discovery Order on 29 October 2025 requiring the plaintiff to make further discovery of four new categories of documents.
The defendant applied for an order requiring the plaintiff to make even further discovery, alleging inadequate identification of custodians, insufficient document review, and failure to properly review documents from external consultants (Building Design Partnership and O’Connell Mahon Architects). The plaintiff’s discovery process involved collecting over 393,000 documents from custodians and advisers, uploading approximately 131,167 to an eDiscovery platform using Continuous Active Learning technology, and ultimately discovering 102 documents—91 produced and 11 withheld on privilege grounds.
The Court’s Holding
Justice Quinn examined the legal framework governing further discovery applications, drawing on the seminal decision in Sterling Winthrop Group Limited v. Farbenfabriken Bayer [1967] IR 97. The court articulated that further discovery will be ordered only when satisfied—from the pleadings, existing affidavits of discovery, discovered documents, or admissions—that relevant documents exist that have not been disclosed, or when reasonable grounds exist to suspect omitted documents due to misunderstanding of the issues.
The judgment addresses four principal issues: (1) adequacy of the custodian list, particularly whether certain identified individuals should have been included as custodians; (2) the volume and adequacy of documents produced given the large corpus reviewed; (3) proper handling of documents from external consultants BDP and OCMA held on a confidential basis; and (4) appropriate date ranges for discovery relative to the original First Discovery Order. The court examined the plaintiff’s solicitors’ affidavit evidence explaining the collection, platform upload, technology-assisted review process, and quality control measures applied, including de-duplication, email threading, and validation testing.
The judgment emphasizes that the plaintiff’s legal advisers received all data sources—including documents from BDP and OCMA provided on a confidential basis—and bore a duty to include all relevant documents in discovery, subject only to legitimate privilege claims. The court reviewed whether the methodology employed, particularly Continuous Active Learning technology, was sufficiently rigorous and transparent to justify the proportionally small number of documents ultimately discovered from the large initial corpus.
Key Takeaways
- Courts will order further discovery when reasonable grounds exist to believe relevant documents are held but undisclosed, or when the party making the discovery affidavit may have misunderstood the legal issues.
- External advisers’ confidential documents received by a party’s solicitors for litigation must be included in discovery if relevant, with only legitimate privilege protecting them from disclosure.
- Modern eDiscovery technology using continuous active learning is permissible but must be applied transparently with adequate quality control and validation testing to justify the documents ultimately produced.
- The adequacy of custodian identification is material to discovery obligations; parties must justify the inclusion or exclusion of individuals who may have held relevant documents.
Why It Matters
This judgment provides guidance on the application of discovery obligations in large, complex commercial litigation involving substantial document volumes. It addresses the tension between proportionality in modern litigation and the duty to make complete disclosure, particularly where technology-assisted review is employed. The decision clarifies that possession of documents by external consultants and advisers does not shield them from discovery obligations when those advisers are acting in the litigation process, a material principle for parties engaged with architects, engineers, and other professional consultants in construction disputes.
The case also touches on a substantive matter of significant practical importance in construction law: the authority of an individual to act as Employer’s Representative under a contract may depend on formal appointment and timing thereof, not merely on de facto performance of the role. For construction professionals and contractors, it underscores the critical importance of documenting and timing formal appointments to contractual roles, particularly roles involving decision-making authority such as instructing the commencement of major project phases.