Breach of Duty in Medical Negligence in Ireland: The Six Dunne Principles Explained

This is general information, not legal advice. Every case depends on its specific facts. Consult a solicitor for advice on your situation.

Summary: A breach of duty in an Irish medical negligence claim occurs when a healthcare professional's treatment falls below the standard that no reasonably competent practitioner of equal skill would have provided. The legal test comes from the Supreme Court's six principles in Dunne v National Maternity Hospital [1989] IR 91, reaffirmed unanimously in Morrissey v HSE [2020] IESC 6. Proving breach requires independent medical expert evidence. According to State Claims Agency data (2024), the total outstanding liability managed by the State Claims Agency stands at approximately €5.35 billion, of which clinical negligence claims represent 81%.

Contents

Legal test: The six Dunne principles from Dunne v NMH [1989], reaffirmed Morrissey v HSE [2020]. Judgment ²

Proof required: Independent expert report confirming care fell below acceptable standard. Experts cost €2,000–€4,000 per report on average.

Time limit: Two years from date of knowledge, not from treatment date. Statute of Limitations (Amendment) Act 1991 ⁴

Court route: Medical negligence claims are exempt from the Injuries Resolution Board and proceed directly to the High Court's Clinical Negligence List.

What is breach of duty in medical negligence in Ireland?

Breach of duty occurs when a healthcare professional provides care that falls below the standard no reasonably competent practitioner of equal specialist skill would have accepted, and that failure causes injury to the patient. Under Irish law, the legal threshold is set by the Dunne principles from the 1989 Supreme Court judgment in Dunne v National Maternity Hospital ¹. A breach isn't simply a poor outcome or an honest mistake. Irish courts explicitly recognise that medicine involves uncertainty, emergency judgment calls, and situations where multiple reasonable approaches exist. What matters is whether the specific clinical decision fell outside the range of what any competent peer would consider acceptable.

Breach must be proved on the balance of probabilities, meaning "more likely than not" (a 51% threshold). This is the civil standard of proof, not the criminal "beyond reasonable doubt" standard. You don't need to prove breach with certainty. You need to show it was more probable than not that the care fell below the Dunne threshold.

Proving breach of duty and proving causation are two separate legal hurdles. You can establish that a doctor's care was clearly substandard, but your claim will still fail unless you separately prove that the breach caused or materially contributed to your injury. For the full causation analysis, see our causation in medical negligence guide.

The six Dunne principles: Ireland's legal test for breach of duty

Chief Justice Finlay delivered six principles in Dunne v National Maternity Hospital [1989] IR 91 that still govern every medical negligence claim in Ireland ¹. The Supreme Court unanimously reaffirmed these in Morrissey v HSE [2020] IESC 6 ².

What "ordinary care" means across different clinical settings

Dunne Principle 1 measures the practitioner against peers "of equal specialist or general status and skill", which means the standard adjusts to the clinician's grade, specialty, resources, and setting. A rural GP without on-site imaging is assessed against other rural GPs with comparable facilities, not against a consultant radiologist in a Dublin teaching hospital. An intern isn't held to the standard of a registrar, but they are expected to recognise when a situation exceeds their competence and escalate to a senior colleague. A consultant obstetrician managing a high-risk delivery is assessed against consultant obstetricians, not against midwives managing a straightforward birth. In practice, the same clinical outcome can constitute breach in one setting and acceptable care in another, depending on the grade and resources of the practitioner involved. Your expert must specify which peer group the defendant is being measured against, because the defence will argue the narrowest reasonable comparator.

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How the Dunne principles apply to common hospital scenarios

The table below maps common breach scenarios to the specific Dunne principle your expert must address.

Common breach scenarios and the Dunne principle each engages

Scenario	Dunne Principle	What the expert must show
GP failed to refer for urgent cancer investigation despite red-flag symptoms	Principle 1 + 6 (core test, applied to diagnosis)	No competent GP of equal skill, presented with those symptoms, would have failed to refer
Surgeon chose a less common operative technique that caused injury	Principle 2 + 4 (departure from practice, honest difference)	Whether any qualified surgeon would have chosen that technique, OR whether it represents a legitimate alternative approach
Hospital followed a flawed monitoring protocol that missed deterioration	Principle 3 (inherent defects in approved practice)	The protocol itself contained defects that should have been obvious, regardless of how many hospitals followed it
A&E doctor misread an X-ray and discharged the patient	Principle 1 + 6 (core test, applied to diagnosis)	No competent A&E doctor exercising ordinary care would have missed the fracture on that imaging
Obstetrician chose conservative management over C-section during labour complications	Principle 4 + 5 (honest difference, court's limited role)	Whether both approaches had professional support, or whether no competent obstetrician would have continued conservative management at that point
Patient not warned about a known risk of elective surgery	Principle 2 (duty in giving warnings, same standard as treatment)	A competent practitioner would have disclosed the specific risk, particularly for elective procedures with grave potential consequences

The same injury can engage different principles depending on whether the failure was individual or systemic. A single doctor missing a diagnosis is tested under Principle 1. An entire department following a flawed triage protocol is tested under Principle 3. Your expert must target the right principle, because the defence strategy changes accordingly.

Breach found vs breach not found: what Irish courts decided

The table below shows how Irish courts have ruled on real clinical facts, illustrating where the Dunne line falls in practice.

Illustrative breach outcomes in Irish medical negligence cases

Clinical facts	Outcome	Dunne reasoning
Cervical smear slides misread as negative by two laboratories. Cancer diagnosis delayed by years.	Breach found. Morrissey v HSE [2020] IESC 6	No competent screener exercising ordinary care would have returned a clear result when abnormalities were present on the slides. HSE held primarily liable through non-delegable duty.
Twin delivery monitored with single fetal heart monitor instead of two. Catastrophic birth injury.	Breach found. Dunne v NMH [1989] IR 91	The routine practice of monitoring only one heartbeat during a twin delivery contained inherent defects (Principle 3). The hospital's standard protocol was itself flawed.
Post-partum haemorrhage managed conservatively rather than escalated per IMEWS/NICE protocols.	Breach not found. Perez v Coombe [2025] IEHC 396	The clinician's conservative management was supported by a competent body of peer opinion in the specific clinical context. Departing from a guideline wasn't automatically negligent (Principles 4 and 5).
Patient alleges substandard psychiatric care but proceeds to trial without an independent expert report.	Claim struck out. Connolly v Casey [1998] IEHC 90	Commencing medical negligence proceedings without expert evidence of breach constitutes abuse of process. The Dunne test cannot be satisfied by the patient's belief alone.

The Dunne principles state what the law requires, but in High Court practice, the dividing line between breach and no breach almost always turns on the quality and specificity of the expert evidence. The same underlying facts can produce different outcomes depending on whether the expert's report squarely addresses the correct Dunne principle and uses the precise wording the court requires.

How Morrissey v HSE [2020] changed the language of breach

The Supreme Court introduced a critical distinction in Morrissey v HSE [2020] IESC 6 that has practical consequences for how breach of duty claims are argued. Chief Justice Clarke ruled that two separate concepts had been improperly conflated across the legal system: the "standard of care" (a legal obligation) and the "standard of approach" (what a clinician actually does) ².

The case arose from the CervicalCheck screening scandal, where two laboratories misread smear tests and Mrs Morrissey received a terminal cancer diagnosis. The High Court had used the phrase "absolute confidence" to describe the standard expected of screeners, which caused alarm across the medical profession. The Supreme Court corrected this, confirming that no court can impose a clinical standard on the profession. Instead, it is the profession's own standards, demonstrated through independent expert evidence, that define the required "standard of approach" ².

The judgment also established that the HSE holds a non-delegable duty of care for screening programmes it adopts and promotes. Even when the actual testing was outsourced to external laboratories, the HSE couldn't escape liability by pointing to independent contractors. This finding directly affects claims involving outsourced diagnostic services, National Treatment Purchase Fund procedures, and other publicly promoted health programmes.

How does Ireland's breach of duty test differ from the UK?

Ireland's Dunne test sets a higher threshold for proving negligence than the UK's Bolam/Bolitho standard. This distinction matters because UK-based legal guidance is often mistakenly applied to Irish cases.

Ireland (Dunne) vs UK (Bolam/Bolitho): key differences in the breach of duty test

Element	Ireland (Dunne Principles)	UK (Bolam/Bolitho Test)
Core question	Would no competent practitioner of equal skill have acted the same way?	Did a responsible body of medical opinion support the action?
Flawed practice	Courts can independently strike down a universally accepted practice with inherent defects	Courts generally defer to peer consensus, rejecting it only when it lacks a logical basis (Bolitho)
Time limit	Two years from date of knowledge	Three years from date of knowledge
Reaffirmed	Morrissey v HSE [2020] IESC 6	Montgomery v Lanarkshire [2015] (informed consent)

The practical effect of the Dunne test is that substandard care which would succeed as a claim in England can fail in Ireland. The Irish test requires the expert to state that no equally qualified practitioner would have acted the same way. In the UK, the expert only needs to confirm the treatment wasn't supported by a responsible body of opinion. The wording sounds similar, but the evidentiary burden is different in practice.

Three categories of breach: diagnosis, treatment, and consent

Breaches of duty fall into three distinct categories, each engaging different Dunne principles and requiring different types of expert evidence:

Diagnostic failures include missed diagnoses, delayed diagnoses, and incorrect diagnoses. Examples include a GP failing to refer for urgent cancer investigation despite red-flag symptoms, or an A&E doctor misreading an X-ray. The expert must show that a competent practitioner of equal skill, presented with the same clinical picture, would have reached the correct diagnosis or ordered appropriate investigations.

Treatment failures cover surgical errors, medication mistakes, inadequate monitoring, premature discharge, and inappropriate clinical management. The expert compares the treatment provided against what any competent peer in the same specialty would consider acceptable.

Consent and disclosure failures arise when a patient isn't properly informed about material risks before a procedure. Dunne Principle 2 addresses warning obligations specifically, requiring the same professional standard as treatment decisions. The difference between assessment and acceptance often comes down to whether the specific risk that materialised was one the patient should have been warned about.

How is breach of duty proved in Irish medical negligence claims?

Breach is proved through independent medical expert evidence from a consultant in the same specialty as the defendant. Without a supportive expert report, a claim cannot proceed, regardless of how obvious the error appears.

Step 1: Obtain full medical records. Your solicitor requests all relevant records under the Data Protection Act 2018. Records include GP notes, hospital charts, imaging, test results, discharge summaries, and referral letters.

What happens when medical records are missing or incomplete

Medical records are the primary evidence for establishing breach of duty, and gaps in those records can work in the claimant's favour. Irish courts can draw an adverse inference against a hospital or practitioner when records are missing, incomplete, or show signs of alteration. This means the court may presume that the missing records would have supported the claimant's case. The principle reflects the reality that hospitals are the custodians of clinical records. Where they fail to maintain adequate documentation, it would be unjust to allow that failure to defeat a patient's claim. Incomplete nursing notes during a critical deterioration period, missing CTG traces during labour, or gaps in medication administration records can all give rise to an adverse inference. Your expert should specifically address any gaps in the records and comment on what a competent practitioner would have documented at each stage. The absence of a record can sometimes be as powerful as the presence of one.

Step 2: Instruct an independent expert. The expert must hold qualifications and experience equal to the defendant's. In practice, experts are frequently sourced from the UK because Ireland's medical community is small and practitioners can be reluctant to criticise colleagues they encounter professionally. Reports typically cost €2,000 to €4,000 depending on complexity.

Screening reports vs full liability reports

Two types of expert report exist, and understanding the difference saves time and money. A screening report is a shorter assessment (typically €500 to €1,500) where an expert briefly evaluates whether the medical records suggest a breach worth investigating further. It doesn't meet court-compliance standards, but it prevents you from committing €3,000+ to a full report on a case with no foundation. A full liability report is the comprehensive, court-compliant document that sets out whether breach occurred based on detailed analysis of all records. This is the report exchanged under S.I. 391/1998 disclosure rules and now under Practice Direction HC131 ¹¹. Your solicitor will recommend the right sequence based on the initial record review.

Step 3: The expert applies the Dunne test. The report must explicitly address whether the care fell below the standard that no reasonably competent practitioner of equal status would have provided. Vague criticism isn't enough. The expert must engage with the specific Dunne principle that applies to the alleged failure.

The exact wording that matters in an expert report

The language an expert uses in their report can determine whether your claim succeeds or fails. The report must state that "no other doctor of equal specialist skill, acting with ordinary care, would have acted in the same way" or equivalent wording that maps directly to Dunne Principle 1. Saying that "another doctor might have acted differently" is not sufficient, because the Dunne test doesn't ask whether some doctors would disagree. It asks whether no competent peer would have done the same thing. The distinction between these two phrasings is the single most common reason expert reports fail to support a claim. If the report hedges with "not best practice" or "a better approach would have been," it may not satisfy the court's threshold.

Step 4: Letter of claim issued. Your solicitor sends a formal letter to the defendant setting out the allegations and the injuries caused.

What happens when experts decline to support your case

Experts sometimes review the records and conclude that the care, while unfortunate, actually met the Dunne standard. When two or three independent experts decline to criticise the treatment, that is a strong indicator that the care wasn't negligent, however poor the outcome. The IRB statistics don't capture this reality: many potential claims are quietly abandoned at the expert review stage, never entering the formal claims data. A good solicitor will give you an honest assessment at this point rather than pursuing a case that cannot succeed. Proceeding without supportive expert evidence is not just inadvisable. Irish case law, including Reidy v National Maternity Hospital [1997] and Connolly v Casey [1998], establishes that commencing medical negligence proceedings without an expert report constitutes an abuse of process and the claim can be struck out.

How long does the expert report stage take?

Instructing an expert and receiving a court-compliant report typically takes three to six months. The timeline breaks down roughly as follows: obtaining complete medical records from all treating hospitals and GPs (4 to 8 weeks, sometimes longer when hospitals are slow to respond), identifying and instructing an appropriate expert in the correct specialty (2 to 4 weeks), the expert reviewing Irish medical records in the context of Irish clinical standards, not UK standards (4 to 12 weeks depending on complexity and the volume of records), and receiving the finalised report. During this entire period, the two-year limitation clock continues to run. When records are incomplete or need to be chased across multiple hospitals, the process can stretch to nine months or more. Starting early protects your deadline and gives your solicitor time to instruct a second expert on causation in parallel, rather than waiting for the breach report before beginning the causation analysis.

The rare exception: res ipsa loquitur

In limited circumstances, breach of duty can be inferred without full expert evidence under the doctrine of res ipsa loquitur ("the thing speaks for itself"). Irish courts have recognised this doctrine in cases where the injury is so obviously the result of negligence that a lay person can recognise it, such as wrong-site surgery, a retained surgical instrument, or amputation of the wrong limb. In Hanrahan v Merck Sharp & Dohme (Ireland) Ltd [1988] ILRM 629, the Supreme Court confirmed that in exceptional circumstances the burden of proof can shift to the defendant to explain how the injury occurred without negligence. This does not eliminate the need to prove causation, and it applies only when the injury is within the exclusive control of the defendant and would not ordinarily happen without someone being negligent. For the vast majority of claims, the standard expert evidence route applies.

Do clinical guidelines equal the legal standard of care?

No. Clinical guidelines inform best practice but do not dictate the binding legal standard in Ireland. The High Court confirmed this in Perez v Coombe Women and Infants University Hospital [2025] IEHC 396, a case involving the management of post-partum haemorrhage.

In Perez v Coombe [2025], Ms Justice Egan dismissed the plaintiff's claim, ruling that a clinician's departure from a published guideline, such as the Irish Maternity Early Warning System (IMEWS) or NICE protocols, is not automatically negligent if the departure was defensible, reasonable, and supported by a competent body of peer opinion in the specific clinical context ⁶. Guidelines are reference aids, not mandatory checklists that remove clinical judgment.

The practical effect for claimants is significant: simply pointing to a deviated guideline won't prove your case. Your independent expert must demonstrate that the specific deviation fell outside the bounds of any acceptable professional practice in the precise circumstances. The Dunne test, not the guideline, remains the legal benchmark.

The Patient Safety Act 2023: what mandatory disclosure means for your claim

The Patient Safety (Notifiable Incidents and Open Disclosure) Act 2023, commenced on 26 September 2024, requires hospitals to disclose specified serious incidents to patients, including wrong-site surgery, deaths arising from medication errors, and certain maternity incidents. However, the Act creates a paradox that claimants must understand.

Under the Patient Safety Act 2023, any apology or information provided during a mandatory open disclosure cannot be used as evidence of fault, professional misconduct, or negligence in civil proceedings ⁷. The disclosure confirms that a notifiable incident occurred, but it cannot prove breach of duty in court.

An open disclosure is a valuable starting signal for your solicitor to begin investigating while evidence is fresh, CCTV is preserved, and witnesses' memories are clear. But the burden of proof under the Dunne test remains entirely unchanged. You still need an independent expert to confirm the care was substandard, completely separately from whatever the hospital disclosed.

What the statistics show about clinical negligence in Ireland

According to State Claims Agency data (2024) ³, the scale of clinical negligence in Ireland is substantial:

State Claims Agency data (year ended 31 December 2024)

Metric	Figure	Source
Active claims under management (all categories)	10,968	SCA Annual Report 2024
Total outstanding liability (clinical and general)	€5.35 billion	SCA Annual Report 2024
Clinical claims share of total liability	81% (~€4.3 billion)	SCA Annual Report 2024
Clinical damages paid (2024)	€210.5 million	SCA data
Claims resolved without court judgment	~98%	SCA Annual Report 2024
Average claim duration	1,462 days (~4 years)	Medical Protection Society (2024)
Average legal cost per claim	€34,646	MPS Report 2024

According to the Medical Protection Society's 2024 claims data report, Ireland's average resolution time of 1,462 days is 56% longer than in the UK (939 days), where pre-action protocols have operated since the late 1990s ⁸. Part 15 of the Legal Services Regulation Act 2015 provides the legal basis for pre-action protocols in Ireland, but the necessary ministerial regulations have never been commenced. The Government's Action Plan for Insurance Reform 2025–2029 targets progress by Q3 2026.

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When a bad outcome is not a breach of duty

A poor medical outcome does not automatically prove negligence. Irish courts explicitly protect the distinction between an error of judgment and actionable negligence. A doctor who makes a reasonable clinical decision that turns out badly is not negligent, provided the decision was one that a competent peer could have made.

Three situations where breach is unlikely, even when the outcome is poor:

Known surgical risks. You were warned about a specific complication before surgery, consented, and the complication occurred despite proper technique. The consent process may protect the practitioner.

Two reasonable approaches. Your treating doctor chose Treatment A over Treatment B. Both are accepted by competent practitioners in the field. Treatment A didn't work. Dunne Principle 4 protects this honest difference of medical opinion.

Unavoidable disease progression. Your condition deteriorated despite timely, adequate care. The deterioration was caused by the underlying illness, not the treatment. Breach of duty requires proof that the clinical action (or omission) fell below the acceptable standard, not that the disease was unkind.

How the Clinical Negligence List changed court proceedings

Practice Directions HC131 and HC132, effective from 28 April 2025, created a dedicated Clinical Negligence List within the High Court. These reforms directly affect how breach of duty claims are prepared and litigated:

Mandatory expert report exchange. Under Practice Direction HC131, you cannot obtain a trial date unless all independent expert reports establishing breach of duty and causation have been mutually exchanged. The practice of withholding expert evidence until trial has been abolished ¹¹.

Specialist judicial oversight. Cases are assigned to judges with deep experience in clinical evidence and the Dunne principles, improving consistency in how breach is assessed.

Mandatory mediation offer. Your legal team must formally offer mediation and commit to participating within a specified timeframe after a trial date is fixed. According to SCA data, approximately 43% of clinical claims resulting in damages are now resolved through mediation ³.

Time limits for breach of duty claims in Ireland

You have two years from the date of knowledge to issue proceedings for a medical negligence claim, under the Statute of Limitations (Amendment) Act 1991 ⁴. The "date of knowledge" is the date you first knew, or should reasonably have known, that your injury was caused by negligent treatment. This is not necessarily the date of the treatment itself.

Extensions apply for claims involving children (the two-year clock doesn't start until the child turns 18), claims involving persons under a disability, and situations where the injury wasn't discoverable at the time of treatment. For full detail on limitation rules, see our medical negligence time limits guide.

Why breach of duty claims fail in Ireland

Understanding why claims fail is as important as understanding how they succeed. Most failed breach claims fall into one of five patterns, and recognising them early prevents wasted time, costs, and emotional investment.

1. Expert evidence doesn't support breach. The most common reason. The independent expert reviews the records and concludes the care, while imperfect, met the Dunne standard. Sometimes the expert uses language that's too weak, such as "not best practice" rather than "no competent practitioner would have acted this way." The wording gap described above accounts for many of the reports that don't cross the legal threshold.

2. Care met the Dunne standard despite a poor outcome. Medicine involves inherent risk. Complications can occur even with proper technique. Courts consistently distinguish between an unfortunate result and actionable negligence. The care must have been unacceptable by peer standards, not merely imperfect.

3. The "two schools of thought" defence succeeds. The defendant produces an expert who confirms that the treatment approach was supported by a body of competent peer opinion. Under Dunne Principle 4, an honest difference of professional opinion isn't negligent. The Perez ruling ⁶ reinforced this in the context of clinical guidelines. Your expert must anticipate this defence and explain why the defendant's approach fell outside any acceptable school of thought, not merely that a different school would have been preferable.

4. Claim is statute-barred. The claimant missed the two-year limitation period from the date of knowledge. There is no discretion to extend this deadline for adults of full capacity in standard circumstances, no matter how strong the underlying case.

5. Breach is established but causation fails. This is technically a causation failure, not a breach failure, but the distinction is often misunderstood. You prove the doctor was negligent, but you can't prove the negligence caused your injury. A GP who failed to refer you for an MRI breached their duty, but the claim fails if the tumour was already inoperable and earlier imaging wouldn't have changed the outcome. See our causation guide for this separate analysis.

What defences will the hospital raise against a breach allegation?

Knowing what the defendant will argue helps you and your expert prepare a report that anticipates and addresses each defence. Hospitals and the State Claims Agency typically deploy one or more of these five defences against a breach of duty claim:

The "responsible body" defence (Dunne Principles 2 and 4). The defendant produces an expert who confirms that the treatment approach was supported by a body of competent peer opinion. Your expert must explain why the specific actions fell outside any acceptable school of thought, not just that a different approach was preferable. The Perez ruling ⁶ strengthened this defence for protocol departures.

The "clinical guidelines are guidance, not law" defence. The defendant argues that departing from a guideline, such as the IMEWS or NICE protocols, was reasonable in the specific clinical context. Your expert must demonstrate that the departure fell outside all acceptable practice, not simply outside the written guideline.

The error-of-judgment defence. The defendant argues the decision was a reasonable clinical judgment that turned out badly, not a negligent failure. Irish courts distinguish between an honest error and actionable negligence. Your expert must show the error was one that no competent practitioner would have made, not merely that hindsight reveals a better option.

The emergency or acute-care defence. In emergency situations, such as acute haemorrhage, cardiac arrest, or emergency C-section, the standard accounts for time pressure, limited information, and the need for rapid decisions. The Dunne test applies equally, but courts recognise that a decision made in three minutes during an emergency is assessed differently from a decision made after two hours of elective planning. Your expert must address the clinical context, including the urgency, the information available at the time, and whether the response was within the range of what a competent practitioner would do under those specific pressures.

Contributory negligence. Under the Civil Liability Act 1961, the defendant may argue that the patient contributed to their own injury. Examples include failing to attend scheduled follow-up appointments, not disclosing relevant symptoms or medical history, ignoring medical advice after discharge, or delaying in seeking treatment for worsening symptoms. Contributory negligence doesn't defeat the claim entirely. Instead, the court reduces the damages award proportionally to reflect the patient's share of responsibility. Your solicitor should identify any contributory negligence risk early and address it in the evidence strategy.

After receiving your expert report and letter of claim, the defendant has three practical responses to the breach allegation specifically: full denial (we didn't breach our duty), admission of breach but denial of causation (we accept the care was substandard, but it didn't cause your injury), or partial admission (we concede breach on one clinical decision but deny it on others). The second response is the one to watch for. Defendants, particularly the State Claims Agency, frequently concede breach early precisely because the causation fight is where they believe they can win. Preparing your causation evidence alongside the breach report, from the very first expert instruction, avoids the trap of securing a breach admission only to discover you've run out of time or budget to prove causation.

What if your case involves additional complexity?

The process above covers straightforward breach of duty claims. Some cases involve complications that change the evidence requirements and timeline. The most common include:

HSE / public hospital claims. Claims against public hospitals are managed by the State Claims Agency ³ under the Clinical Indemnity Scheme. You sue the HSE as employer, not the individual clinician. The SCA operates with institutional settlement protocols and actuarial models, which affects negotiation dynamics.

Outsourced care (NTPF procedures). The non-delegable duty principle from Morrissey ² may apply when the HSE promotes a programme but outsources the clinical work. Liability isn't automatically defeated by the involvement of an independent contractor.

Multiple defendants. Where more than one healthcare professional contributed to the failure, such as a GP and hospital consultant, breach must be established separately against each defendant. This increases expert evidence requirements and costs.

For the full step-by-step process of building a claim from medical records through to resolution, see our how to prove medical negligence guide.

Could your situation involve a breach of duty? A structured self-check

Before committing time or money to a formal assessment, walk through these five questions. They follow the same logic a solicitor applies when assessing whether a case has a reasonable prospect of meeting the Dunne threshold.

Question 1 of 5

Were you under the care of a healthcare professional in Ireland?

A doctor-patient relationship must exist. This includes GPs, hospital consultants, dentists, midwives, nurses, and professionals in both public and private settings. The duty of care arises automatically when a professional agrees to treat you.

Yes No Not sure

Next steps if you suspect a breach of duty

Estimated effort: Initial consultation takes 30–60 minutes. What you need: dates and names of treating professionals, a timeline of symptoms and treatment, any correspondence from the hospital.

1. Write down your timeline of treatment dates, symptoms, and the names of treating professionals while your memory is fresh.
2. Preserve evidence. Request copies of your full medical records. Ask the hospital to preserve any relevant CCTV or monitoring data.
3. Get specialist legal advice early. Medical negligence claims have a two-year time limit and require expert evidence costing €2,000–€4,000. Early assessment prevents wasted costs on cases that won't meet the Dunne threshold.
4. Don't rely on an open disclosure as proof. Disclosures under the Patient Safety Act 2023 are a signal to investigate, not evidence of breach in court.

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Common Questions

What is breach of duty of care in medical negligence?

Breach of duty occurs when a healthcare professional provides care that falls below the standard no equally skilled practitioner would have accepted, as defined by the six Dunne principles established in Dunne v National Maternity Hospital [1989].

• The test measures against peer standards, not perfection.
• Proof requires independent expert evidence.
• A bad outcome alone doesn't establish breach.

Why it matters: Breach is the most contested element in Irish medical negligence claims.

Next step: How to prove medical negligence • Expert medical report guide

What are the Dunne principles?

The Dunne principles are six rules set by the Supreme Court in 1989 that define the legal test for breach of duty in every Irish medical negligence claim. They were unanimously reaffirmed in Morrissey v HSE [2020].

• Principle 1 sets the core threshold: failure no competent peer would commit.
• Principle 3 allows courts to reject flawed common practices.
• Principle 4 protects honest differences of medical opinion.

Why it matters: Every expert report and every court judgment in Irish medical negligence applies these principles.

Next step: Full explanation above

Do I need an expert report to prove breach of duty?

Yes. Without an independent expert report from a consultant in the relevant specialty, confirming that the care was substandard under the Dunne test, a breach of duty claim cannot proceed in Ireland.

• Reports cost €2,000–€4,000 on average.
• Experts are often sourced from the UK due to Ireland's small medical community.
• The expert owes a duty to the court, not to the patient or solicitor.

Why it matters: The expert report is the foundation of every medical negligence claim.

Next step: Expert report guide

Is deviating from a clinical guideline automatically negligent?

No. The High Court confirmed in Perez v Coombe [2025] that clinical guidelines inform best practice but do not set the legal standard. A departure is not negligent if it was defensible and supported by competent peer opinion in the specific context.

• Guidelines are reference aids, not mandatory checklists.
• The Dunne test, not the guideline, remains the benchmark.
• Your expert must show the deviation fell outside all acceptable practice.

Many claimants assume a deviated protocol proves their case. It does not.

Next step: Full Perez ruling analysis above

Can I use a hospital's open disclosure as evidence of breach?

No. Under the Patient Safety Act 2023, any apology or information shared during a mandatory open disclosure meeting cannot be used as evidence of liability in civil proceedings.

Disclosure confirms a notifiable incident occurred but acts as a signal to investigate, not proof of negligence. You still need independent expert evidence to satisfy the Dunne test. Clients often assume a hospital apology proves their case, but the law specifically prevents this.

Patient Safety Act analysis above

Is the Irish breach of duty test the same as the UK test?

No. Ireland uses the Dunne principles, which set a higher threshold than the UK's Bolam/Bolitho standard. The Dunne test asks whether no practitioner of equal skill would have acted the same way, while Bolam asks whether a responsible body of opinion supports the action.

• Some cases that succeed in the UK would fail in Ireland.
• Ireland's "inherent defects" exception gives courts broader power than Bolitho.
• The two-year Irish limit is shorter than the UK's three years.

Why it matters: UK-based guidance is often mistakenly applied to Irish cases.

Next step: Full comparison above

How long do I have to bring a breach of duty claim?

Two years from the date of knowledge under the Statute of Limitations (Amendment) Act 1991. The clock starts when you knew or should have known your injury was caused by negligent care, not from the date of treatment.

• Extensions exist for children and persons under a disability.
• Late-discovery injuries can extend the deadline.
• This is one year shorter than the UK limit.

Why it matters: Missing this deadline means your claim is statute-barred, regardless of its merit.

Next step: Time limits guide

How long does a medical negligence claim take in Ireland?

According to Medical Protection Society data, the average resolution time is 1,462 days (approximately four years). This is 56% longer than the UK average of 939 days, largely because Ireland lacks pre-action protocols.

• Approximately 98% of claims resolve without a court judgment.
• Practice Directions HC131/HC132 (effective April 2025) mandate earlier expert exchange.
• 43% of successful claims now resolve through mediation.

Why it matters: Understanding realistic timelines helps you plan financially and emotionally.

Next step: Claim timeline guide

Does a bad outcome prove breach of duty?

No. Irish courts recognise that medicine involves risk and uncertainty. A poor outcome alone doesn't establish that the care was substandard. You must prove through expert evidence that the treatment fell below the Dunne standard, and that a competent practitioner wouldn't have acted the same way.

• Known surgical risks with proper consent aren't breaches.
• Honest judgment calls between reasonable options are protected.
• Disease progression despite adequate care isn't negligence.

This is the most common misconception among potential claimants.

Full analysis above

Do I need a specialist solicitor for a breach of duty claim?

You aren't legally required to use a specialist, but medical negligence claims are among the most complex areas of Irish law. The expert evidence requirements, Dunne principles, SCA negotiation dynamics, and strict time limits mean most claimants need specialist representation.

• Expert selection requires knowledge of which specialties and individuals are appropriate.
• SCA and hospital defence teams are highly experienced.
• One procedural misstep can defeat a valid claim.

Why it matters: The evidence threshold in Ireland is higher than in comparable jurisdictions.

Medical negligence solicitor Dublin • 01 903 6408

Related questions

What's the difference between breach of duty and causation? Breach asks whether the care was substandard. Causation asks whether the substandard care caused your injury. Both must be proved separately. See our causation guide.

Can I claim if I signed a consent form? Signing consent doesn't automatically bar a claim. The consent process must have been adequate, covering material risks a reasonable patient would want to know. See our informed consent guide.

Who do I sue if the negligence happened in a public hospital? You claim against the HSE as employer. The State Claims Agency manages the defence and any settlement. See our claims against HSE guide.

Additional resources

Citizens Information: hospital services and patient rights

Medical Council: making a complaint about a doctor

Judicial Council Personal Injuries Guidelines (2021)

References

1. Dunne v National Maternity Hospital [1989] IR 91. Supreme Court of Ireland. Judgment delivered by Finlay CJ, 14 April 1989. Established the six principles governing breach of duty in Irish medical negligence law. vLex Ireland
2. Morrissey v HSE [2020] IESC 6. Supreme Court of Ireland. Unanimous five-judge decision delivered by Clarke CJ, 19 March 2020. Reaffirmed the Dunne principles and distinguished "standard of approach" from "standard of care." Courts.ie
3. State Claims Agency / NTMA Annual Report 2024. National Treasury Management Agency, published July 2025. Contains data on active claims, outstanding liability, and resolution methods for clinical and general claims. stateclaims.ie
4. Statute of Limitations (Amendment) Act 1991. Oireachtas. Establishes the two-year limitation period for personal injury claims, running from date of knowledge. Irish Statute Book
5. Data Protection Act 2018. Oireachtas. Provides the legal basis for patients to request full copies of their medical records. Irish Statute Book
6. Perez v Coombe Women and Infants University Hospital [2025] IEHC 396. High Court. Judgment delivered by Ms Justice Emily Egan, 8 July 2025. Confirmed clinical guidelines are informative but not binding on the legal standard of care. CaseMine
7. Patient Safety (Notifiable Incidents and Open Disclosure) Act 2023. Oireachtas. Commenced 26 September 2024. Mandates open disclosure of specified serious incidents but prohibits use of disclosures as evidence of fault. Irish Statute Book
8. Medical Protection Society Ireland: Claims Data Report 2024. MPS, published 2024. Reports average Irish claim resolution time of 1,462 days and average legal cost of €34,646. medicalprotection.org
9. Legal Services Regulation Act 2015. Oireachtas. Part 15 provides the legal basis for pre-action protocols in clinical negligence, not yet commenced. Irish Statute Book
10. Action Plan for Insurance Reform 2025–2029. Government of Ireland. Targets Q3 2026 for progress on pre-action protocols for clinical negligence. Gov.ie
11. Practice Directions HC131 and HC132: Clinical Negligence List. Courts Service of Ireland, effective 28 April 2025. Mandate expert report exchange and mediation offers in clinical negligence proceedings. Courts Service
12. Civil Liability Act 1961. Oireachtas. Governs contributory negligence, fatal injury claims, and dependency actions in Irish tort law. Irish Statute Book

Related internal guides: How to prove medical negligence • Causation explained • Expert medical reports • Time limits • Medical negligence solicitor Dublin

This is general information, not legal advice. Every case depends on its specific facts. Consult a solicitor for advice on your situation.