Credibility-Permeating Disputes Defeat Modular Trials; Whole-Life Damages Favoured Where Prognosis Is Firm

Case: McInerney [Minor] v Kildare County Council (Approved) Citation: [2026] IEHC 61
Court: High Court of Ireland (Barr J) Date: 13 February 2026

1. Introduction

This interlocutory judgment addresses case-management and pleading issues in a high-value personal injuries claim brought by an infant plaintiff, Patrick McInerney (suing by his mother and next friend), against Kildare County Council. The plaintiff alleges that, aged five, he fell from a ~3m wall at a halting site after the Council permitted a mound of earth/debris to remain against the wall, enabling children to climb it, and that the wall top was defective. The defendant disputes the accident mechanism entirely, suggesting the skull fracture occurred via interaction with a horse/pony, and alleges fraud, collusion, and exaggeration affecting both liability and quantum.

Three procedural issues arose:

  • Modular trial: the plaintiff sought a first module on liability, with quantum only if liability succeeded.
  • Interim vs whole-life damages: if modularity were ordered, the plaintiff sought to leave to the trial judge whether damages should be assessed on an interim basis; separately he sought interim assessment.
  • Particulars of special damages: the defendant sought full particulars of special damages on a whole-life basis and a response on housing engagement relevant to an accommodation claim.

2. Summary of the Judgment

  • Modular trial refused: where credibility issues “permeate across the entire spectrum” of liability and quantum, modularising liability would unfairly prejudice the defendant or cause duplication of evidence and cost.
  • Interim assessment refused: given the plaintiff’s age (almost 16), the passage of time since the accident, and the existence of a “firm opinion” prognosis in the plaintiff’s neurology report, damages should proceed on a whole-life basis (subject to the trial judge’s ultimate control).
  • Particularisation ordered: the plaintiff must plead and furnish full particulars of special damages (past and future) on a whole-life basis within eight weeks of perfection of the order; and must respond to the defendant’s housing-engagement query relevant to the accommodation head of loss.

3. Analysis

3.1 Precedents Cited

Barr J located the modular-trial application within established Irish authority emphasising that the default is a unitary trial and that modular orders require justification by reference to fairness, coherence of issues, and real efficiency.

Cork Plastics (Manufacturing) v Ineos Compound UK Limited [2008] IEHC 93

Although not analysed at length, its citation situates the application within the High Court’s modern case-management jurisprudence: modular trials are exceptional, and the court must be satisfied they advance the administration of justice rather than fragment it.

McCann v Desmond [2010] 4 IR 554

This was the judgment’s central authority. Barr J expressly adopted Charleton J’s framework (quoted at length) as the governing test, treating it as a correct and approved statement of principle. The four limbs were applied in substance:

  • Isolability: can issues be determined cleanly without “tearing the fabric” of the case?
  • Real savings: have concrete time/cost savings been identified, viewed through the lens of justice?
  • Prejudice: would modularity impede either side in proving/responding to the case?
  • Tactical misuse: is the motion a device to advantage one party rather than assist resolution?

The judgment’s distinctive contribution is its application of McCann to a fact-pattern where alleged dishonesty, coaching, and selective history-giving were said to infect not only quantum but also the core question of “how did the accident happen?”

Weavering Macro Fixed Income Fund Limited (In Liquidation) v PNC Global and Ors. [2012] IESC 60

The Supreme Court authority is invoked as part of the “well-known cases” confirming that modularity is not a routine case-management convenience but a measure constrained by fairness and the coherent adjudication of disputed issues.

IT (A Minor) v HSE [2025] IECA 291

The Court of Appeal citation underscores that modularity principles remain live and are applied across subject-matter contexts, including cases involving minors. Barr J’s reliance indicates continuity: even in cases involving vulnerable plaintiffs, modular orders must not compromise trial fairness or distort the evidential picture.

3.2 Legal Reasoning

(A) Why modularity failed: credibility as the “connecting tissue” between liability and quantum

The plaintiff’s modularity proposal was attractive on a superficial efficiency logic: if liability failed (e.g., skull fracture caused by a horse/pony rather than a fall from the wall), the expensive quantum case—with extensive experts—would fall away. However, Barr J treated that as incomplete because the defendant’s pleaded case was not merely “liability denied”; it was “liability denied + fraud/collusion/exaggeration alleged,” with credibility central.

The reasoning proceeds in two steps:

  • Fairness prejudice if quantum credibility material is excluded: If liability is tried first as a narrow factual inquiry (who saw what; did the fall happen), the defendant would be restricted from testing the parents’ credibility on alleged misstatements made in the quantum sphere (e.g., medical histories, reported coma, boxing participation). Barr J accepted that such material could be essential to evaluating whether the parents’ narrative about the accident itself is reliable.
  • Inefficiency if quantum credibility material is included: If, to avoid unfairness, the defendant is allowed to “roam” across quantum credibility in the liability module, the defendant may need to call medical/other witnesses in the liability module to prove what was said and why it matters, and then call them again in the quantum module for their substantive opinions. That duplication would undermine the asserted savings and lengthen the litigation.

In effect, the court characterised the case as an “organic whole” (to use Charleton J’s phrase) because credibility was not compartmental: it was the common thread running through accident mechanism, causation, prognosis, and special damages.

(B) Whole-life vs interim damages: prognosis certainty, not plaintiff age alone

The court explained the rationale for interim assessment in infant cases: where future disability cannot be accurately predicted until developmental/educational milestones are reached, an interim award avoids speculation and preserves fairness. But the court rejected interim assessment here because:

  • the accident occurred 10+ years earlier;
  • the plaintiff was nearly 16; and
  • Dr Declan O’Rourke’s report was treated as offering a “firm opinion” on future disability without indicating that prognosis must await adulthood.

Importantly, Barr J preserved judicial flexibility: the trial judge retains overriding control to revisit the question if a fair whole-life assessment proves impossible in light of the evidence at trial.

(C) Particulars of special damages: actuarial reports are not pleadings

The court drew a practical pleading distinction: even if the defendant has received an actuary’s report quantifying lifetime losses, that does not amount to a formal articulation of the claim in pleadings/particulars. Given the scale (suggested potentially exceeding €25m) and the refusal of interim assessment, basic procedural fairness required:

  • full particulars of special damages to date and into the future; and
  • a response on housing engagement, because an accommodation claim of ~€1.3m–€1.4m makes it legitimate to ask what steps were taken to pursue social housing supports.

3.3 Impact

(A) Modular trials in fraud/credibility-heavy personal injury litigation

The judgment strengthens a practical proposition likely to be cited in future case-management disputes: where credibility issues span both liability and quantum, modularising liability will usually be inappropriate. The decision makes explicit that modularity is not merely a question of whether liability can be decided first in theory, but whether doing so would: (i) restrict legitimate cross-examination relevant to credibility; or (ii) force duplicative witness calling that erodes efficiency.

(B) Whole-life assessment for older minors where prognosis is already settled

For catastrophic-injury style claims brought by minors nearing adulthood, the judgment signals that interim assessment is not automatic. The key question is whether the medical evidence itself indicates that a reliable lifelong prognosis is presently achievable. Where it is, the court will tend towards whole-life assessment, while leaving a safety valve for the trial judge.

(C) Pleading discipline in high-value special damages claims

The order for particulars underscores that defendants are entitled to clarity in the formal claim, not merely expert quantification. In practice, this may drive earlier crystallisation of accommodation, care, and future-loss heads, and enable more focused expert meetings, discovery, and settlement evaluation.

4. Complex Concepts Simplified

  • Modular trial: a trial broken into separate stages (“modules”), e.g., liability first, then damages only if liability is found.
  • Unitary trial: the conventional approach—liability and quantum tried together in one continuous hearing.
  • Quantum: the amount of damages (compensation) payable if liability is established.
  • Whole-life assessment: damages assessed once, covering past loss and future loss for the plaintiff’s expected lifetime.
  • Interim assessment: damages assessed for past loss and a limited future period (here, proposed five years), with the possibility of returning later for a final assessment when prognosis becomes clearer.
  • Special damages: out-of-pocket financial losses and expenses (e.g., care costs, therapies, equipment, accommodation, transport, future earnings loss), as distinct from general damages for pain and suffering.
  • Next friend: an adult who conducts litigation on behalf of a minor who cannot sue in their own name.
  • Perfection of an order: the formal finalisation/issuing of the court order; time periods ordered by the court often run from that date.

5. Conclusion

McInerney [Minor] v Kildare County Council (Approved) reaffirms that modular trials are exceptional and will be refused where credibility and alleged fraud/exaggeration are interwoven with both liability and quantum. Barr J’s approach is pragmatic: if modularity restricts fair cross-examination, it is unjust; if it permits full cross-examination, it risks duplicative evidence and defeats efficiency. The judgment also clarifies that interim damages in infant cases are driven by prognostic uncertainty rather than age alone, and it reinforces pleading discipline by requiring full particulars of whole-life special damages where whole-life assessment is to proceed.