Breach of duty of care

Breach of duty of care is the second element of the tort of negligence in English law, occurring where the defendant fails to act with the standard of care that a reasonable person — or in professional contexts, a reasonably competent practitioner of the same calling — would have exercised in the same circumstances.

Definition §

In the tort of negligence, breach of duty of care is the failure to meet the standard required by law in the discharge of a duty owed to another person ^[1]. The cause of action in negligence requires four elements: (i) a duty of care owed by the defendant to the claimant; (ii) breach of that duty; (iii) damage caused by the breach; and (iv) the damage being of a kind that is not too remote. Breach is the conduct-focused element.

The general standard is objective: that of the hypothetical reasonable person placed in the same situation as the defendant. For professionals, however, the standard is elevated to that of the reasonably competent practitioner exercising and professing to have the skill of the relevant calling ^[2]. This professional standard is articulated in Bolam v Friern Hospital Management Committee, which holds that a professional is not negligent if their conduct accords with a practice accepted as proper by a responsible body of opinion in the relevant profession ^[2]. The Bolam test is qualified by Bolitho v City and Hackney Health Authority, under which the court may reject a body of professional opinion that is not capable of withstanding logical analysis ^[3].

Breach of duty of care is the principal cause of action triggering a professional indemnity insurance policy, whether the policy is written on a civil liability or negligent act, error or omission basis. It is also the foundation of liability under the duty of care owed by an adviser to a client under Hedley Byrne v Heller, and to third parties within the limits set by Caparo v Dickman ^[4][5].

Legal / Regulatory basis §

The tort of negligence emerged in its modern form in Donoghue v Stevenson, where Lord Atkin held that 'you must take reasonable care to avoid acts or omissions which you can reasonably foresee would be likely to injure your neighbour' ^[1]. The neighbour principle established the duty of care concept, and the standard of care developed alongside it as a separate enquiry into conduct.

The professional standard was articulated in Bolam, where McNair J directed the jury that 'a man need not possess the highest expert skill … it is sufficient if he exercises the ordinary skill of an ordinary competent man exercising that particular art' ^[2]. Bolitho qualified the rule by requiring the professional opinion relied on to withstand logical scrutiny ^[3]. Together the cases provide the framework for assessing breach in the great majority of professional negligence cases in England and Wales.

The duty itself, on which breach is predicated, is governed by Hedley Byrne for negligent misstatement and by Caparo for the tripartite test of foreseeability, proximity and fairness, justice and reasonableness ^[4][5]. White v Jones extended the duty to disappointed beneficiaries in solicitor will-drafting cases ^[6]; Smith v Eric S Bush extended it to mortgage purchasers in valuer cases on modest residential properties ^[7]. Henderson v Merrett Syndicates confirmed that concurrent duties in contract and tort may co-exist ^[8]. The high-water mark of expansion in Anns v Merton London Borough Council ^[9] was rolled back by Murphy v Brentwood District Council, which restricted recovery in negligence for defective premises ^[10].

Limitation of negligence claims is governed by the Limitation Act 1980. The general six-year limitation period in section 2 is supplemented by section 14A, introduced by the Latent Damage Act 1986, which provides a three-year period from the date of knowledge subject to a fifteen-year long-stop ^[11][12].

How it works in practice §

In a professional negligence claim, the breach analysis is normally the principal battleground. The claimant must identify the act or omission complained of, plead the standard alleged to have been breached, and adduce evidence — usually expert evidence — that the defendant's conduct fell below that standard.

For PI insurers, the existence of an arguable breach engages the duty to indemnify the insured for defence costs (subject to the policy wording) and to consider settlement. The cover analysis is not the same as the merits analysis: an indefensible claim might still fall outside cover (for example because it is caught by an exclusion), and a strong defence on breach does not relieve the insurer of its obligation to fund defence costs to the limit of indemnity.

Defence strategies in breach turn substantially on expert evidence. The defendant's expert will typically be instructed to opine that the conduct was in accordance with a responsible body of opinion in the profession (engaging Bolam), and that the body of opinion withstands logical analysis (preempting Bolitho) ^[2][3]. Contemporaneous documentation — file notes, retainer letters, advice memoranda, peer review records — is critical, because the courts assess breach by reference to what the defendant knew or ought to have known at the time, not in hindsight.

A finding of breach is necessary but not sufficient: the claimant must also prove causation and that the loss is recoverable. Causation in many professional negligence cases is contested on the 'but for' test (would the loss have been suffered if the breach had not occurred?) and on the SAAMCO principle limiting recoverable losses to those within the scope of the duty owed.

Where breach is established, settlement is normally the preferred outcome. PI insurers are entitled, under standard subrogation and consent-to-settle clauses, to control or veto settlement, although solicitor PI under the MTC is subject to specific requirements ^[13].

Common variations §

General standard of reasonable care. Applied to lay defendants under the Donoghue v Stevenson principle ^[1]. Most non-professional liability claims, for example slip-and-trip cases, apply this standard.

Professional standard under Bolam. The default for professionals, requiring conduct in accordance with a responsible body of professional opinion ^[2].

Professional standard under Bolitho. The qualification that the professional opinion must withstand logical analysis ^[3].

Heightened standard for specialists. Where the defendant professes a particular specialism, the standard is that of the reasonably competent specialist in the same field. This applies, for example, to specialist counsel, consultants and certified experts.

Statutory duties of care. Various statutes impose duties of care that are enforceable in tort: examples include the Defective Premises Act 1972, section 1 ^[14], and the duty under the Occupiers' Liability Acts 1957 and 1984.

Fiduciary duties. Although not strictly a duty of care, breach of fiduciary duty (loyalty, no-conflict, no-profit) co-exists with negligence in some professional retainers and may also engage PI cover under a civil liability trigger.

Example §

An illustrative example: a firm of conveyancing solicitors acts for a buyer in the purchase of a leasehold flat. The lease contains an onerous ground rent escalation clause. The solicitor fails to flag the clause in the report on title. The buyer completes the purchase. Two years later the buyer attempts to sell and the prospective purchaser pulls out citing the ground rent terms. The buyer sues for the diminution in market value.

The claimant's case is that a reasonably competent conveyancing solicitor would have identified the onerous clause and advised on its implications, and that the defendant's failure to do so was a breach of the Bolam standard ^[2]. The defence might rely on contemporaneous practice at the time of the transaction, but a court applying Bolitho may reject a defence that no responsible body of opinion would now sustain ^[3]. Causation depends on whether the buyer would have proceeded with full advice; remoteness on whether the diminution in value was within the scope of the duty owed under the SAAMCO principle. The illustrative loss of £45,000 is allocated against the per-claim limit, subject to excess.

See also §

• /wiki/professional-indemnity-insurance/ — parent contract
• /wiki/negligent-act-error-or-omission/ — corresponding trigger
• /wiki/civil-liability/ — broader trigger
• /wiki/hedley-byrne-v-heller/ — duty for negligent misstatement
• /wiki/caparo-v-dickman/ — tripartite duty test
• /wiki/bolam-test/ — standard of professional care
• /wiki/bolitho-test/ — logical analysis qualification

References §

1. ↑ Donoghue v Stevenson [1932] AC 562 (HL)
2. ↑ Bolam v Friern Hospital Management Committee [1957] 1 WLR 582
3. ↑ Bolitho v City and Hackney Health Authority [1998] AC 232 (HL)
4. ↑ Hedley Byrne & Co Ltd v Heller & Partners Ltd [1964] AC 465 (HL)
5. ↑ Caparo Industries plc v Dickman [1990] 2 AC 605 (HL)
6. ↑ White v Jones [1995] 2 AC 207 (HL)
7. ↑ Smith v Eric S Bush [1990] 1 AC 831 (HL)
8. ↑ Henderson v Merrett Syndicates Ltd [1995] 2 AC 145 (HL)
9. ↑ Anns v Merton London Borough Council [1978] AC 728 (HL)
10. ↑ Murphy v Brentwood District Council [1991] 1 AC 398 (HL)
11. ↑ Limitation Act 1980 — https://www.legislation.gov.uk/ukpga/1980/58
12. ↑ Latent Damage Act 1986 — https://www.legislation.gov.uk/ukpga/1986/37
13. ↑ SRA Minimum Terms and Conditions of Professional Indemnity Insurance — https://www.sra.org.uk
14. ↑ Defective Premises Act 1972 — https://www.legislation.gov.uk/ukpga/1972/35