Factual and Procedural Background
This appeal arises from a decision of the Employment Tribunal at Manchester, which was heard over 12 days and delivered on 4 January 2010. The Tribunal dismissed the Claimants' multiple claims that they suffered detriment as a result of making protected disclosures under sections 43A and 47B of the Employment Rights Act 1996. The case involved five separate claims heard together.
The Claimants were registered nurses employed by the Respondent. The first Claimant was a Clinical Coordinator responsible for a walk-in centre, while the other Claimants were nurses primarily based at the same centre. The dispute originated from concerns raised about a general nurse's qualifications and clinical experience, which the Claimants believed were exaggerated or false. These concerns were communicated internally and constituted protected disclosures as they related to the health and safety of individuals.
Following the protected disclosures, tensions escalated within the workplace, dividing staff into supporters of the nurse in question, supporters of the Claimants, and those wishing to remain neutral. The Respondent's management investigated but took limited action, leading to further workplace dysfunction. The Claimants faced various detriments, including removal from their workplace roles and reduction or cessation of work. The Claimants alleged these detriments were linked to their protected disclosures, including a claim of unfair dismissal by one Claimant.
The Employment Tribunal considered whether the detriments suffered were "on the ground that" the Claimants had made protected disclosures and examined issues of causation, vicarious liability, and the burden of proof. The Tribunal ultimately found that while the Claimants suffered detriment due to workplace tensions, these were not causally connected to their protected disclosures in the manner required for liability.
On 10 March 2010, the matter was referred to a full hearing by HHJ Peter Clark. The present appeal challenges the Employment Tribunal's findings on causation, vicarious liability, and burden of proof.
Legal Issues Presented
- What is the appropriate test of causation for establishing liability under section 47B of the Employment Rights Act 1996—specifically, the meaning of the phrase "on the ground that" in relation to protected disclosures?
- Whether the Employment Tribunal erred in failing to properly consider the Respondent's vicarious liability for acts of employees who allegedly victimised the Claimants following their protected disclosures.
- Whether the Employment Tribunal incorrectly placed the burden of proof on the Claimants rather than the Respondent in victimisation claims under the whistle-blowing provisions.
Arguments of the Parties
Appellants' Arguments
- The Employment Tribunal applied an incorrect and overly stringent test of causation, requiring the protected act to be the direct and proximate cause of detriment rather than a material or significant factor.
- The Tribunal failed to properly investigate or make findings on the Respondent's vicarious liability for the detrimental acts of its employees.
- The burden of proof in victimisation claims under whistle-blowing legislation should be aligned with discrimination law, requiring the employer to prove that detriment was "in no sense whatever" associated with the protected disclosure.
- Whistle-blowing victimisation should be assimilated to other forms of discrimination and victimisation, enhancing protection for whistle-blowers.
Respondent's Arguments
- The Employment Tribunal correctly applied the test of causation as established in London Borough of Harrow v Knight, requiring the protected disclosure to be the real or core reason for the detriment.
- The whistle-blowing provisions do not impose vicarious liability on employers for employees' acts, unlike other discrimination statutes, and the Respondent cannot be vicariously liable for such acts.
- Other remedies, such as under the Protection from Harassment legislation, are available for detriments caused by employees, making vicarious liability unnecessary in whistle-blowing victimisation cases.
- The Tribunal correctly placed the burden of proof on the employer once detriment was established, consistent with the statutory framework.
Table of Precedents Cited
| Precedent |
Rule or Principle Cited For |
Application by the Court |
| James v Eastleigh Borough Council [1990] IRLR 288 |
Use of "but for" test in discrimination cases to determine causation. |
Discussed as a comparison but rejected as the appropriate test for causation in whistle-blowing victimisation claims. |
| London Borough of Harrow v Knight [2003] IRLR 140 |
Test of causation requiring the protected disclosure to be the "real reason" or "core reason" for detriment. |
Relied upon by the Employment Tribunal and Respondent; the court considered this test appropriate for establishing causation. |
| Aspinall v MSI Mech Forge Limited [2002] EAT 891/01 |
Protected disclosure must be the real or principal reason for detriment. |
Supported Respondent’s argument on causation; the court referred to this as a relevant authority. |
| Cumbria County Council v Carlisle-Morgan [2007] IRLR 314 |
Employer may be vicariously liable for acts of employees done in the course of employment. |
Accepted by the court as authoritative on vicarious liability in whistle-blowing victimisation cases; the court found the Employment Tribunal had failed to consider this fully. |
| Woodward v Abbey National [2006] IRLR 677 |
Burden of proof in discrimination and victimisation claims. |
Relied upon by Appellants to argue for alignment of burden of proof in whistle-blowing cases with discrimination law. |
| Virgo Fidelis Junior School v Boyle [2004] IRLR 268 |
Burden of proof in victimisation claims. |
Supported Appellants’ submissions on burden of proof. |
| Barton v Investec Henderson Crosthwaite Securities Ltd [2003] ICR 1205 |
Guidelines for burden of proof in discrimination claims requiring respondent to prove no discrimination "in no sense whatsoever". |
Adopted by the court as part of the test for causation and burden of proof in victimisation claims. |
| Igen v Wong [2005] IRLR 258 |
Binding authority on burden of proof and causation in discrimination claims requiring employer to prove treatment was in no sense related to protected characteristic or act. |
Held binding by the court and applied to whistle-blowing victimisation claims with emphasis on broad protection for whistle-blowers. |
| Nagarajan v London Regional Transport [1999] IRLR 572 (HL) |
Interpretation of "on racial grounds" and "by reason that" as a subjective test of reason or motive rather than strict legal causation. |
Interpreted as consistent with the "significant influence" test; court relied on this reasoning for causation in victimisation claims. |
| Majrowski v Guy's and St Thomas' NHS Trust [2006] UKHL 34 |
Principles of vicarious liability for statutory torts. |
Referred to by the court to clarify vicarious liability requires acts to be closely connected with employment. |
| Kuzel v Roche Products Limited [2008] EWCA Civ 380 |
Burden of proof and practical approach in discrimination cases. |
Quoted to emphasize the practical application of burden of proof and common sense in tribunals. |
| Chief Constable of West Yorkshire Police v Khan [2001] ICR 1065 |
Clarification of causation in victimisation claims; "by reason that" denotes motive rather than strict causation. |
Applied by the court to distinguish causation from motive and to support a subjective test of reason for detriment. |
| Villalba v Merrill Lynch [2006] IRLR 437 |
Application of burden of proof and causation in victimisation claims. |
Referenced to support the binding effect of Igen v Wong and the approach to causation and burden of proof. |
Court's Reasoning and Analysis
The court carefully examined the factual findings of the Employment Tribunal and the legal principles governing victimisation claims under the Employment Rights Act 1996. It noted that the Tribunal had accepted the existence of protected disclosures and that the Claimants suffered detriment in the workplace. However, the Tribunal found that these detriments were not causally connected to the protected disclosures "on the ground that" the Claimants had made them, applying a test requiring the protected act to be the real or core reason for the detriment.
The court analyzed the competing tests for causation, rejecting the "but for" test as inappropriate in this context. It endorsed the approach from Igen v Wong, which requires the employer to prove on the balance of probabilities that the detriment was "in no sense whatever" connected to the protected disclosure, equating this to a test of whether the protected act played more than a trivial role. This approach aligns victimisation in whistle-blowing with victimisation in discrimination law, reflecting the policy objective of protecting whistle-blowers.
Regarding vicarious liability, the court found that the Employment Tribunal had not adequately addressed whether the Respondent was liable for the detrimental acts of its employees. The court emphasized the established principle that an employer may be vicariously liable for wrongful acts committed by employees in the course of employment, including under whistle-blowing legislation, citing Majrowski and Cumbria County Council.
The court also clarified the burden of proof, confirming that once a detriment is established, the employer must prove that the act or omission was not connected to the protected disclosure. It rejected the argument that the Tribunal had wrongly placed the burden on the Claimants.
Ultimately, the court concluded that the Employment Tribunal's findings were deficient, particularly in relation to vicarious liability and the correct test for causation. It remitted the case for reconsideration applying the proper legal principles.
Holding and Implications
The court ALLOWED THE APPEAL and remitted the case to the Employment Tribunal for reconsideration.
The direct effect is that the Employment Tribunal must re-examine the facts applying the correct test for causation—that the employer must prove the detriment was not causally connected to the protected disclosure beyond a trivial influence—and must properly investigate and make findings on the Respondent's potential vicarious liability for the acts of its employees. The court emphasized the importance of broad protection for whistle-blowers consistent with the statutory framework and relevant case law.
No new precedent was established by this decision; rather, the court reaffirmed and applied existing legal principles concerning causation, burden of proof, and vicarious liability in whistle-blowing victimisation claims.