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Bolitho test meaning

What does Bolitho test mean?
The Bolitho test describes how courts assess medical expert evidence in clinical negligence when a defendant relies on accepted practice to justify the standard of care. The judge will accept a “responsible body” of professional opinion only if it withstands logical analysis; if the reasoning is illogical or unreasonable, the court may reject it even where competent practitioners support it. This principle arises from case law—Bolitho v City and Hackney Health authority [1997] 4 All ER 771; [1998] AC 232 (HL)—and is often framed as Bolam qualified by Bolitho. Key legal features and practical use: - Focus on the cogency of the expert’s reasons, including treatment of risks and benefits, factual assumptions and internal consistency. - The number of experts is irrelevant; the quality and logic of their reasoning is decisive. - Applied mainly to breach of duty; it does not allow the court to substitute its own medical opinion. Jurisdictions: - England & Wales and Northern Ireland: Bolam/Bolitho governs the medical standard of care and expert evidence. - Scotland: the Hunter v Hanley test applies, but courts similarly reject professional opinions that lack a logical basis. - Ireland: the Dunne principles apply; courts may refuse to follow an accepted practice if not reasonable, consistent with Bolitho-style analysis.
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View the related News about Bolitho test

NEWS
Halsall v Champion: SAAMCO 'advice' established; negligence found but time-barred; TOB cannot narrow retainer; LA 1980 s14A knowledge and UCTA exclusion considered (England and Wales)

Original news Halsall & Ors v Champion Consulting Ltd & Ors [2017] EWHC 1079 (QB) What should dispute resolution lawyers take note of? Dispute resolution lawyers should note: the potentially broad consequences of the court’s conclusion that the defendants gave affirmative advice rather than merely passing on information (SAAMCO). Absent a limitation defence, they would have faced liability for all losses the claimants suffered by entering the schemes professional advisers cannot invariably depend on their terms of business (TOB) to restrict the retainer’s scope if those terms conflict with earlier clear representations On breach, the court used the Bolam test as refined by Bolitho. Yet Montgomery v Lanarkshire Health Board was not referred to, leaving uncertainty as to whether that approach still holds for negligence based on failing to warn of risks. The notion that the court need consider the claimant’s counterfactual conduct only where the negligence is a failure to advise is doubtful. The claimant must in every case...

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NEWS
Conway v Yeovil & UHBW: Meadows scope-of-duty limits in paediatric negligence—no duty to prevent unknown child abuse post-discharge; Bolam/Bolitho breach findings (England and Wales)

Conway (by his father and litigation friend Luke Conway) v Yeovil District Hospital NHS Trust and University Hospitals Bristol and Weston NHS Foundation Trust [2025] EWHC 2488 (KB) What are the practical implications of this case? Conway stands as a clear illustration of a court working through the Supreme Court’s principles in Meadows v Khan [2022] AC 852, though in a distinct context. In Meadows, the claimant underwent blood tests to check if she carried the haemophilia gene. She was told by doctors she was not a carrier and that any child she conceived would not have haemophilia. Her son was born with both haemophilia and autism. Had she known she was a carrier through genetic testing, rather than blood tests alone, she would not have proceeded to have a child. The issue was whether she could also recover wrongful birth damages for the costs associated with her son’s autism, a condition independent of his haemophilia. The Supreme Court held she could not, as that loss fell outside...

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View the related Practice Notes about Bolitho test

PRACTICE NOTES
Informed consent in UK clinical negligence: material risks and alternatives under Montgomery, reasonable options per Bolam/Bolitho and McCulloch, and causation including Chester

This Practice Note addresses the principle of self-determination, valid consent, implied consent, provision of sufficient information in line with Montgomery, and causation. A doctor may lawfully treat a patient only where consent has first been obtained. This applies whether the intervention is a straightforward test or an invasive procedure. In reality, consent disputes usually emerge after more serious, higher-risk care such as surgery. Any adult who has the mental capacity to make their own treatment choices may accept or decline care, even where refusal could result in permanent harm or death to them or to their unborn child. Nor can such treatment be justified by detaining the person as a mental patient. For additional issues on consent—emergency treatment, withdrawal, capacity, professional guidance, battery, and Human Rights Act 1998 claims—see Practice Note: Consent in clinical negligence claims—capacity and other issues. The principle of self-determination The principle of self-determination sits at the heart of medical law and consent disputes in clinical negligence. See Airedale NHS Trust v Bland...

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PRACTICE NOTES
Clinical negligence: duties owed by clinicians and others, scope of duty, and breach—Bolam/Bolitho, Montgomery, Khan v Meadows; non-delegable duties, non-patients and secondary victims

The duty of care Healthcare practitioners owe their patients a duty of care. That obligation, arising in the course of their care, requires the exercise of reasonable care to: obtain a full and adequate medical history thoroughly explore the patient’s symptoms and concerns formulate appropriate and reasonable differential diagnoses arrange referrals to relevant specialists where required take action to pursue all reasonable measures to safeguard the patient’s health deliver a reasonable and proportionate course of treatment follow up with the patient afterwards where that is reasonably necessary For guidance on identifying the proper defendant in a clinical negligence claim, see Practice Note: Identifying the correct defendant in clinical negligence claims. The duty is not confined to medical practitioners alone; it may extend further. Non-clinical staff Employees within a healthcare organisation or facility may owe a direct duty to patients. In Darnley v Croydon Health Services NHS Trust, the claimant attended A&E with a head injury...

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