Revision Hub / Module 4 · Liability Routes & Special Heads
Employers' Liability
Snapshot
Where a workplace tort injures a claimant, English law offers two independent routes. Route one is primary liability in negligence: the employer owes each employee a personal, non-delegable duty fixed by Wilsons & Clyde Coal Co v English [1938] AC 57 — competent staff, adequate plant, a safe workplace and a safe system of work. Route two is vicarious liability: the employer answers for the tort of an employee (or one in a relationship "akin to" employment) where the wrong is sufficiently connected to the role. Route two is governed by the two-stage test re-articulated in Various Claimants v Catholic Child Welfare Society [2012] UKSC 56, refined in Cox v MoJ [2016] UKSC 10, narrowed in WM Morrison v Various Claimants [2020] UKSC 12 and Various Claimants v Barclays Bank [2020] UKSC 13, and re-stated in BXB [2023] UKSC 15. A First answer keeps the two routes parallel and decides each on its own elements.
1. The primary, non-delegable employer's duty
The duty is owed to each individual employee, not generically to "the workforce": Paris v Stepney BC [1951] AC 367 (one-eyed mechanic) confirms the standard responds to the claimant's particular vulnerabilities. The duty is non-delegable — the employer cannot escape it by entrusting performance to a competent contractor or manager (McDermid v Nash Dredging & Reclamation Co [1987] AC 906). Performance is delegated; responsibility is not.
- Facts
- A miner was injured by colliery haulage equipment; the employer argued supervision had been entrusted to a competent statutory agent.
- Holding
- The employer remained personally liable. Lord Wright crystallised the duty as a four-fold obligation owed in person.
- The four-fold duty
- (i) competent staff; (ii) adequate plant and equipment; (iii) a safe place of work; (iv) a safe system of work, including effective supervision.
- Significance
- The architecture of every primary-liability claim; each limb is a free-standing duty.
Competent staff. The employer must select, train and where necessary discipline fellow employees so one is not a danger to another. Hudson v Ridge Manufacturing Co [1957] 2 QB 348 imposed liability where a known practical joker tripped a colleague. Waters v Commissioner of Police of the Metropolis [2000] 1 WLR 1607 extended the principle to bullying and harassment by colleagues.
Adequate plant and equipment. At common law the duty was reasonable care — discharged in Davie v New Merton Board Mills [1959] AC 604 by buying from a reputable manufacturer. Parliament reversed that result in the Employer's Liability (Defective Equipment) Act 1969, s 1: where defective equipment provided for the employee's use causes injury and the defect is wholly or partly attributable to a third party's fault, the employer is liable as if at fault, with recourse against the manufacturer.
Safe workplace. Not absolute — the workplace need not be risk-free. Latimer v AEC Ltd [1953] AC 643 (flooded factory floor strewn with sawdust) held the employer non-liable, the cost of closure being disproportionate to the residual risk. Breach is the ordinary Bolton v Stone calculus.
Safe system of work. Method, organisation, training, supervision and enforcement. General Cleaning Contractors v Christmas [1953] AC 180: providing equipment is not enough — the employer must instruct in its use. Pape v Cumbria CC [1992] ICR 132: gloves but no warning of dermatitis risk; breach. Jebson v Ministry of Defence [2000] 1 WLR 2055: drunk soldier fell off a transport lorry; absence of supervision was breach. Causation must still be proved: in McWilliams v Sir William Arrol [1962] 1 WLR 295 the steel-erector would not have worn a harness even if provided, so the breach did not cause the death.
2. Application — occupational stress and psychiatric injury
The primary duty extends to psychiatric harm caused by the work. The doctrinal launch-pad is Walker v Northumberland County Council [1995] 1 All ER 737, the first case holding an employer liable for stress-induced psychiatric illness: a social-services manager suffered two breakdowns under an unmanageable caseload; after the first, the employer was on notice the second was foreseeable.
The Court of Appeal then systematised the field in Hatton v Sutherland [2002] EWCA Civ 76, where Hale LJ laid down sixteen propositions. The core points: (i) ordinary negligence principles apply; (ii) the threshold is whether psychiatric injury to this employee was reasonably foreseeable; (iii) foreseeability turns on what the employer knew or ought to have known; (iv) the employer may generally take what the employee says at face value, absent good reason otherwise; (v) only when indications of impending harm are plain must the employer act; (vi) steps demanded must be reasonable in cost and effect. The House of Lords confirmed Hatton in Barber v Somerset CC [2004] UKHL 13 (maths teacher whose distress signals had been disregarded), allowing the appeal but endorsing Hale LJ's structure.
3. Vicarious liability — the two-stage test
Vicarious liability is a separate, secondary form of liability. The employer is not at fault; it answers for another's tort because the relationship and the connection together make it just. The modern doctrine is two-stage; both must be satisfied.
- Facts
- Historic sexual abuse allegations against members of a teaching order (the Christian Brothers) at an approved school; the brothers were not paid employees of the order.
- Holding
- The order was vicariously liable. Lord Phillips articulated the modern two-stage test and identified five "incidents" justifying VL on a quasi-employer (control; integration; activity for the defendant's benefit; risk created by the defendant; financial means).
- The two-stage test
- Stage 1: a relationship capable of grounding VL — employment or akin to it. Stage 2: the tort sufficiently closely connected with that relationship.
4. Stage 1 — the relationship: employees, "akin to" relationships, and the contractor exclusion
Employees plainly satisfy Stage 1; independent contractors do not. The 2012–2017 expansion brought a third class — relationships akin to employment — which the Supreme Court has since reined in.
- Facts
- A prison catering manager was injured when a prisoner kitchen-worker negligently dropped a sack of rice on her back.
- Holding
- The MoJ was vicariously liable. Lord Reed: a non-employment relationship can ground VL where the tortfeasor's activities are integral to the defendant's business, conducted for its benefit, and assigning them created the risk of the wrong.
- Significance
- "Akin to employment" suffices; payment and a contract are not prerequisites.
Armes v Nottinghamshire CC [2017] UKSC 60 applied the same approach to local-authority foster carers, holding the council vicariously liable because the carers' role formed an integral part of the authority's statutory child-care function.
The Supreme Court then drew the line at genuine independent contractors.
- Facts
- Barclays required medical examinations by Dr Bates, a self-employed GP paid per examination. Bates allegedly sexually assaulted many examinees. He was deceased by the time of litigation.
- Holding
- Barclays was not vicariously liable. Lady Hale: Stage 1 fundamentally asks whether the tortfeasor is in business on his own account. Dr Bates plainly was — own practice, own premises, own equipment, billing per job — so "akin to employment" did not apply.
- Significance
- Re-asserted the independent-contractor exclusion. Cox and Armes qualified that limit for genuinely integrated quasi-employees; they did not abolish it.
5. Stage 2 — the close-connection test
Stage 2 asks whether the tort was so closely connected with what was entrusted to the tortfeasor that it can fairly be regarded as committed in the course of employment. The test emerged in Lister after the older "Salmond" test (an authorised act, or unauthorised mode of an authorised act) failed to yield justice in cases of intentional wrongdoing, notably Trotman v North Yorkshire CC [1999] LGR 584.
- Facts
- The warden of a school boarding house systematically sexually abused boys in his care.
- Holding
- The employer was vicariously liable. The torts were so closely connected with the employment — the warden's job was to care for the boys; abuse was a perversion of, and inextricably interwoven with, that task — that imposing liability was fair and just.
- Significance
- Established the modern "close connection" test, displacing Salmond for intentional torts.
- Facts
- A petrol-station kiosk attendant followed a Somali customer onto the forecourt and racially abused and beat him.
- Holding
- Morrisons was vicariously liable. Lord Toulson reformulated Stage 2 as a two-step enquiry: (i) what "field of activities" was entrusted; (ii) was there sufficient connection between that role and the wrong to make liability just?
- Subsequent treatment
- Read alone, Mohamud looked very wide. The Supreme Court has since insisted Lord Toulson did not change the law; close connection remains a substantive filter.
- Facts
- A senior auditor, grudging after disciplinary proceedings, copied the payroll database (~100,000 staff) and posted it online. The data subjects sued Morrisons for VL under the DPA 1998 and at common law.
- Holding
- Not vicariously liable. The disclosure was not closely connected with the auditor's authorised tasks; he was on a "frolic of his own", motivated by personal vendetta. Motive, while not determinative, can be highly relevant where it confirms the wrong was outside the field entrusted.
- Significance
- Corrected over-broad readings of Mohamud. Lister remains good law; close connection is a real, limiting enquiry.
6. Recent applications — Chell and BXB
Two post-2020 decisions show how Stage 2 now operates and re-emphasise that VL is not strict employer-pays-for-everything liability.
- Facts
- A contractor's fitter, working alongside Tarmac employees, brought "pellet targets" (small explosive discs) to work, placed two on a bench by the claimant's ear and struck them with a hammer, causing tinnitus.
- Holding
- Tarmac was not vicariously liable, and not in breach of its primary duty. The prank was outside the field entrusted; pellet targets were not work equipment; the act was a personal joke, not an authorised task badly done.
- Significance
- Horseplay disconnected from the work falls outside Stage 2; primary liability requires foresight of the specific risk.
- Facts
- An elder of the congregation raped a fellow member, BXB, in his home. The families were close friends; the rape took place after a morning of evangelism, in a domestic setting.
- Holding
- The Trustees were not vicariously liable. Stage 1 was satisfied — the elder's role was akin to employment — but Stage 2 was not: the rape was not closely connected with his authorised activities. The setting (his home, social context, after the religious activity had ended) took it outside the close-connection test.
- Significance
- The most recent Supreme Court re-statement of both stages. Lord Burrows underscored that the doctrine must keep pace with its rationale — fairness as between innocent claimant and risk-creating quasi-employer — without sliding into strict liability.
7. Application framework
- Identify the claimant and harm. Employee injured at work? Open with the primary, non-delegable duty. Non-employee injured by an employee? Skip to vicarious liability. If both apply, plead in parallel.
- Route one — the four-fold duty. Walk Lord Wright's four limbs (Wilsons & Clyde Coal): competent staff, adequate equipment (cf the 1969 Act), safe place, safe system. Identify which limb is on the facts. Then breach (Latimer, Bolton v Stone calculus) and causation (McWilliams).
- Stress cases — Hatton/Barber. Was psychiatric injury reasonably foreseeable to this employee? Use the Hatton propositions: indications of impending harm; what the employer knew or ought to have known; reasonableness of preventive steps.
- Route two — Stage 1 (relationship). Employee? Quasi-employee (Cox, Armes)? Or independent contractor running their own business (Barclays Bank)? Apply Lord Phillips' five incidents from Christian Brothers; ask Lady Hale's "in business on his own account" question.
- Route two — Stage 2 (close connection). What field of activities was entrusted? Is the wrong inextricably interwoven with that role (Lister), or is it a frolic / personal vendetta (Morrisons) / horseplay (Chell) / off-duty domestic act (BXB)? Justify using fairness as between the innocent claimant and the risk-creating defendant.
- Defences and remedies. Note contributory negligence (McWilliams shows how missing PPE can defeat causation entirely). Where VL is established the employer's primary indemnity from the tortfeasor is theoretical: VL operates against the deep pocket precisely because the tortfeasor cannot pay.
8. Common pitfalls
9. Exam checklist
- Identified whether the claimant is an employee (route one available) or a non-employee victim of an employee's tort (route two only).
- Stated the four-fold non-delegable duty from Wilsons & Clyde Coal and pinpointed which limb is engaged.
- For stress claims, applied the Hatton/Barber framework — foreseeability of injury to this employee.
- Walked Stage 1 of vicarious liability: employment, akin to employment, or independent contractor (Cox; Christian Brothers; Barclays Bank).
- Walked Stage 2: field of activities and close connection (Lister; Mohamud as qualified by WM Morrison).
- Cited Chell and BXB for current calibration of the close-connection test.
- Addressed causation in the primary-duty claim (McWilliams) and any relevant defences.
- Closed by saying which route succeeds, why, and whether both might in principle run in parallel.