Introduction

The recognition of psychological injury in the Irish courts has long been characterised by tension between compassion for genuine mental suffering and the policy need to contain liability within manageable bounds. The Supreme Court’s recent decision in Dillon v Irish Life Assurance plc [2025] IESC 37 reasserts the classical position that only a medically recognised psychiatric illness constitutes a compensable “personal injury” under Irish law. This judgment, read alongside earlier authorities such as Fletcher, Devlin, Harford, and Mitchell, refines the evidentiary requirements for plaintiffs alleging workplace-related psychological harm arising from bullying, harassment, intimidation or penalisation.

The combined effect of these decisions is to draw a bright-line distinction between ordinary occupational distress and psychiatric injury. Employers are not insurers against every emotional consequence of workplace conflict; liability only arises where the employee proves, through expert medical evidence, that they have suffered a recognised psychiatric disorder caused by the employer’s breach of duty.

The Legal Foundation: From Kelly v Hennessy to Fletcher

In Fletcher v Commissioners for Public Works [2003] IESC 13, Keane C.J. reaffirmed that the definition of “personal injury” in section 2 of the Civil Liability Act 1961 encompasses any disease or impairment of a person’s mental condition. However, this was not to be interpreted so broadly as to include mere emotional reactions. The plaintiffs in Fletcher suffered reactive anxiety neurosis following exposure to asbestos dust and the subsequent fear of developing mesothelioma. Crucially, the psychiatric evidence established that this was a recognisable psychiatric illness, satisfying the first requirement in Kelly v Hennessy [1995] 3 IR 253.

In Fletcher v Commissioners of Public Works (2003), the plaintiff, a maintenance worker in Leinster House, was regularly exposed to asbestos dust over several years. Although he never developed a physical illness, he later learned that his exposure put him at a small risk of developing mesothelioma (a fatal lung disease). This news caused him severe anxiety, and a psychiatrist diagnosed him with reactive anxiety neurosis. The High Court awarded damages for psychiatric injury, but the Supreme Court overturned that decision.

The Supreme Court, led by Chief Justice Keane, accepted that the plaintiff genuinely suffered a recognised psychiatric illness. However, it ruled that because the medical evidence showed only a very remote risk of him ever developing mesothelioma, it would be contrary to public policy to award compensation. The Court held that allowing claims for psychiatric illness caused by a remote or irrational fear of disease would open the floodgates to speculative or trivial claims.

In essence, while psychiatric injuries can be recognised as “personal injuries” under the Civil Liability Act 1961, the Court decided that fear of future disease without actual physical harm or a substantial risk is not compensable.

The Limits of Emotional Distress: Devlin v National Maternity Hospital

In Devlin v NMH [2007] IESC 50, Denham J (as she then was) reinforced the Fletcher principle, holding that mere distress or grief, however profound, does not constitute a compensable injury unless supported by medical evidence of a psychiatric disorder. The Court refused to infer injury where the plaintiff had not adduced such evidence, warning against judicial “manufacture of evidence which is not there.”

The case of Devlin v National Maternity Hospital arose from deeply tragic circumstances. Bridget and Terence Devlin’s baby was stillborn at the National Maternity Hospital. A post-mortem was carried out without their consent, and the hospital retained the baby’s organs without informing the parents. Many years later, the hospital wrote to the Devlins explaining what had happened. On learning this, Mrs. Devlin suffered severe shock and post-traumatic stress disorder. She brought proceedings against the hospital for negligence and “nervous shock,” seeking damages for the psychiatric injury she had suffered.

The High Court dismissed her claim, and the Supreme Court, in a judgment delivered by Denham J., upheld that decision. The Court accepted that Mrs. Devlin had suffered a genuine psychiatric illness. However, it held that the law on “nervous shock,” as set out in Kelly v Hennessy [1995] 3 IR 253 and reaffirmed in Fletcher v Commissioners of Public Works [2003] 2 ILRM 94, did not extend to her situation.

Denham J. applied the five conditions from Kelly v Hennessy, which require the plaintiff to show: (1) that they suffered a recognised psychiatric illness; (2) that the illness was shock-induced; (3) that it was caused by the defendant’s act or omission; (4) that the shock arose from actual or apprehended physical injury to the plaintiff or another person; and (5) that such injury was reasonably foreseeable. While Mrs. Devlin satisfied most of these conditions, the Court found that the fourth requirement was not met. Her injury arose from learning distressing news about her child, not from witnessing or experiencing a sudden event involving physical harm.

The Court declined to extend the law to include psychological injury caused by receiving shocking information after the fact. Denham J. warned that broadening the duty of care to cover such cases would create too much uncertainty and risk an unmanageable expansion of liability for emotional harm. The judgment also reaffirmed that feelings of grief, sorrow, or distress, however intense, are not legally compensable unless they amount to a medically recognised psychiatric disorder caused by a qualifying “shock” event.

Although Devlin did not arise in an employment setting, it has significant implications for workplace stress and bullying claims. It reinforces that plaintiffs must produce medical evidence of a recognised psychiatric illness. General feelings of stress, humiliation, or anxiety, even if severe, are not enough. The decision also draws a firm distinction between psychiatric illness caused by a sudden traumatic event and the effects of prolonged workplace stress or conflict, which the courts regard as outside the “nervous shock” category.

Overall, Devlin v National Maternity Hospital confirms the narrow scope of liability for psychological injury under Irish law. It reflects a deliberate judicial policy of restraint, ensuring that employers and other defendants are not treated as insurers for all forms of emotional suffering. For workplace stress claims, this means that employees must establish, through medical diagnosis and expert evidence, that they suffered a psychiatric disorder caused directly by the employer’s conduct. Without that proof, claims based on distress, burnout, or unhappiness at work will not succeed.

For workplace bullying claims, Devlin underscores that subjective distress or humiliation, without medical corroboration, cannot sustain a claim. Plaintiffs must prove not just that the conduct occurred, but that it caused a psychiatric illness capable of diagnosis. This imposes a high evidentiary burden: HR complaints and witness statements may describe distress, but they do not amount to medical proof.

Contemporary Refinement: Harford v Electricity Supply Board

The Court of Appeal in Harford v ESB [2021] IECA 112 (Noonan J) examined whether psychiatric injury could arise absent a sudden, calamitous event. The Court affirmed that recovery remains confined to psychiatric illness caused either by (a) physical injury or (b) “shock” — a sudden sensory perception of a distressing event. Importantly, the plaintiff in Harford suffered a diagnosed post-traumatic stress disorder after narrowly avoiding electrocution, satisfying the Kelly criteria.

Harford demonstrates that foreseeability and proximity are insufficient in themselves; the plaintiff must establish both shock and illness. This reasoning has direct implications for bullying cases, which rarely involve a single “qualifying event.” Instead, such claims typically arise from prolonged exposure to hostile workplace conduct. Absent medical proof that such exposure culminated in a recognised psychiatric condition, the courts will not treat such experiences as compensable.

The case of Harford v Electricity Supply Board involved an experienced ESB network technician who narrowly avoided electrocution while carrying out repair work on a public street light in Dublin. The plaintiff, Mr. Harford, mistakenly handled a 10,000-volt (medium voltage) cable, believing it to be a low-voltage line. He realised the danger only moments before inserting testing probes that would likely have killed him. Although he was never physically injured, the realisation that he had been seconds away from death caused him significant psychological distress, leading to a medically recognised psychiatric illness (diagnosed as either post-traumatic stress disorder or depression).

The High Court accepted that Mr. Harford suffered a genuine psychiatric injury and awarded him €80,000 in damages. However, the Electricity Supply Board appealed the decision. The central issue before the Court of Appeal was whether a plaintiff could recover damages for psychiatric injury (or “nervous shock”) when there was no sudden or calamitous event, but instead a gradual realisation that serious injury had been narrowly avoided.

In a detailed judgment delivered by Noonan J., the Court of Appeal overturned the award and dismissed the claim. The Court accepted that Mr. Harford had developed a recognised psychiatric illness but held that the injury was not “shock-induced” in the legal sense required by Irish law. There had been no “sudden, horrifying, or calamitous event” — only a later realisation of danger after the fact. The Court found that his reaction was a gradual process, developing over time as he reflected on what might have happened, rather than an immediate response to a shocking event.

Noonan J. relied heavily on earlier authorities, including Kelly v Hennessy [1995] 3 IR 253, Fletcher v Commissioners of Public Works [2003] 1 IR 465, and Devlin v National Maternity Hospital [2008] 2 IR 222. He reaffirmed that, to recover damages for psychiatric injury, a plaintiff must show (1) that they suffered a recognised psychiatric illness, (2) that the illness was caused by sudden shock, and (3) that it arose from actual or apprehended physical injury to themselves or another person. Importantly, the “apprehension” must be prospective — that is, fear of something about to happen — rather than a retrospective realisation of a danger already avoided.

The Court also pointed out that Mr. Harford had never been in real physical danger: the cable remained insulated, and he had handled it safely multiple times without harm. Therefore, there was no “qualifying event” capable of giving rise to nervous shock. Allowing recovery in such circumstances, Noonan J. reasoned, would represent an unwarranted extension of the law and create uncertainty. The Court emphasised that Irish law requires a sudden sensory perception of a distressing event that “violently agitates the mind” — a definition derived from Lord Ackner’s statement in Alcock v Chief Constable of South Yorkshire Police [1992] 1 AC 310.

In conclusion, the Court of Appeal held that the plaintiff’s injury, though genuine, did not meet the necessary legal criteria for compensable psychiatric harm. His condition resulted from an evolving realisation of what might have happened, not from an immediate “shock” event. The Court allowed the ESB’s appeal and dismissed the claim.

Implications for Workplace Stress and Psychological Injury Claims

Harford v ESB reinforces the high evidentiary and legal threshold for psychological injury claims in Ireland. It confirms that psychiatric injury must result from a sudden, shocking event, not from gradual stress, reflection, or workplace pressures. This is particularly important in the context of bullying, harassment, or occupational stress claims, which usually arise from ongoing patterns of behaviour rather than single traumatic incidents.

The judgment also illustrates that foreseeability of distress or risk is not enough. Even if an employer’s negligence foreseeably causes mental strain, liability will not arise unless the employee can prove a recognised psychiatric illness triggered by a qualifying “shock” event. The decision highlights the courts’ consistent caution, seen in earlier cases like Fletcher and Devlin, against expanding the boundaries of liability for mental injury.

For workplace stress claims, Harford underscores that employees who develop psychological illness due to cumulative pressures or hostile work environments will struggle to recover damages under the “nervous shock” framework. Their remedies are more likely to lie under statutory regimes such as the Safety, Health and Welfare at Work Act 2005 or the Employment Equality Acts, rather than through personal injury litigation.

Ultimately, Harford reaffirms that the Irish courts maintain a strict distinction between distress and injury: genuine psychiatric illness remains compensable, but only where it arises from a sudden, shocking, and foreseeable event directly connected to the employer’s breach of duty.

Public Policy and the Extension of Duty: Mitchell v HSE

In Mitchell v HSE [2023] IEHC 394, O’Connor J refused to extend the duty of care for nervous shock beyond the immediate victims of negligent medical treatment. Applying Morrissey v HSE [2019] IEHC 268, the Court held that public policy precluded recognising an open-ended duty to avoid causing distress to third parties. The judgment reflects judicial caution against unbounded claims for emotional harm, even where distress is genuine and foreseeable.

This reasoning resonates strongly in the employment context. Employers owe a duty to prevent foreseeable psychiatric injury, not to shield employees from the ordinary vicissitudes of working life. The courts remain reluctant to recognise secondary victims or derivative distress in workplace disputes — a stance that effectively confines recovery to employees who can demonstrate direct causation and medical impairment.

Reaffirmation and Consolidation: Dillon v Irish Life Assurance plc

Building on this jurisprudence, the Supreme Court in Dillon [2025] IESC 37 drew a categorical distinction between (a) emotional distress, which may constitute non-material damage under data protection or employment statutes, and (b) psychiatric injury, which alone constitutes “personal injury” under the PIAB and Civil Liability Acts. Murray J’s reasoning aligns with Fletcher, rejecting the argument that temporary distress or anxiety amounts to “impairment of mental condition.”

For workplace stress and bullying claims, Dillon effectively closes the door to personal injury litigation based on stress without medical diagnosis. Employees alleging workplace mistreatment must establish that the conduct caused a medically recognised psychiatric disorder — typically supported by expert psychiatric or psychological evidence. Absent such proof, claims must proceed under alternative statutory regimes (such as the Safety, Health and Welfare at Work Act 2005 or the Employment Equality Acts) rather than through the personal injuries system.

Proofs and Practical Implications for Practitioners

After Dillon, a plaintiff in a workplace bullying, harassment, or penalisation claim must adduce evidence addressing the following elements:

Existence of a Recognised Psychiatric Disorder:

The illness (e.g., depression, anxiety disorder, PTSD, adjustment disorder) must be diagnosed by a competent medical expert. Mere references to “stress” or “burnout” are insufficient.

Causation:

The medical evidence must explicitly link the diagnosed disorder to specific workplace conduct, demonstrating that the injury was a foreseeable consequence of the employer’s breach.

Foreseeability and Breach:

The employer must have known or ought to have known that its acts or omissions posed a risk of psychiatric injury to an employee of normal fortitude.

Objective Corroboration:

The plaintiff’s account should be supported by occupational health reports, GP records, or expert psychiatric testimony — not solely by witness descriptions of distress.

Procedural Compliance:

Where a psychiatric injury is alleged, the claim falls within the definition of “personal injury” and thus requires PIAB authorisation prior to litigation.

Conclusion

The trajectory from Fletcher through Harford, Mitchell, and Dillon confirms a tightening of evidentiary standards for psychological injury in workplace disputes. While Irish law remains open to recognising psychiatric harm caused by workplace mistreatment, the courts demand clear medical proof of disorder, causation, and foreseeability.

In practical terms, Dillon consolidates the view that workplace bullying claims framed in emotional or moral terms — distress, humiliation, isolation — will fail absent medical diagnosis. It restores doctrinal coherence between tort law, statutory employment protections, and data protection jurisprudence. For employers, the decision offers predictability; for employees, it underscores the importance of early medical assessment and evidentiary preparation.

The line between “stress” and “injury” is now firmly redrawn: distress may be compensable under equality or whistleblowing regimes, but it is not a personal injury unless it results in psychiatric impairment.

Further information

This article was prepared for informational purposes only. For further advice, please email workclaim@crushell.ie or contact the offices of Crushell & Co Solicitors.