2. Background and Issues
The protected disclosure
The appellant worked for the Trust from April 1995 until August 2024, latterly as a day care worker responsible for the day-to-day operation of a centre. In March 2023, she raised concerns about moving and handling procedures involving a service user, RM. It was agreed that her communication of 23 March 2023 constituted a protected disclosure.
The Trust examined the concerns informally under its public interest disclosure arrangements. It concluded that no patient safety concern requiring a formal public interest investigation had been established.
The appellant alleged that her identity as a whistleblower had been disclosed without consent, that colleagues had ostracised her, and that her concerns had not been properly investigated. The Tribunal accepted the Trust’s evidence that she had consented to relevant management disclosure and had not been identified, directly or indirectly, at a staff meeting. Those were findings made at first instance; the Court of Appeal’s ultimate order required all issues to be reconsidered.
Ill health and dismissal
The appellant was absent on long-term sickness leave from April 2023. The Trust held attendance management meetings, considered medical information and explored redeployment. She maintained that she could not return to her substantive role and subsequently indicated that she intended to apply for ill-health retirement.
Following a capability process, the Trust dismissed her on 16 August 2024. An internal appeal was arranged but not pursued. The Tribunal accepted that the dismissal was fair, capability-based and unconnected with her protected disclosure.
The appeal
The appellant advanced three grounds:
- The Tribunal had applied an excessively demanding, diagnosis-focused approach to disability.
- It had failed to provide adequate reasons for rejecting material whistleblowing detriments.
- It had inadequately considered the operative requirements of the Trust’s whistleblowing policy.
4. Legal Reasoning
A. The limits of an appeal on a point of law
Article 22 of the Industrial Tribunals (Northern Ireland) Order 1996 permits an appeal on a point of law. It does not provide a general rehearing of the evidence.
The Court of Appeal therefore distinguished disagreement with factual findings from an error in the legal approach used to reach them. Factual conclusions ordinarily stand unless unsupported by sufficient evidence or so inconsistent with the established facts that the opposite conclusion is irresistible. Particular restraint is appropriate where findings depend on oral evidence and credibility.
The successful ground crossed that threshold because it concerned the legal framework applied to disability. The court was not simply preferring a different interpretation of the medical material.
B. Disability is determined by function, not diagnosis
Section 1 of the DDA 1995 requires a physical or mental impairment having a substantial and long-term adverse effect on the person’s ability to carry out normal day-to-day activities. Schedule 1 supplies the relevant rules concerning duration and recurrence.
The assessment therefore requires attention to:
- Whether there is a physical or mental impairment.
- Whether it adversely affects normal day-to-day activities.
- Whether that effect is substantial, meaning more than minor or trivial.
- Whether the effect is long-term within the statutory rules.
Drawing on Kelly v Department for Communities and another [2023] NICA 91, the court emphasised that:
“It is a legal and not a medical test.”
A recognised diagnosis may assist, but it is not a substitute for applying these elements. Equally, an absence of diagnostic precision does not itself answer whether the statutory test is satisfied.
C. How the Tribunal departed from that approach
The Tribunal had considered occupational health reports, GP communications, a psychologist’s letter and other mental health material. Its analysis concentrated on references to stress and anxiety, the limited express documentation of anxiety over time, and the absence of a diagnosis of depression.
It suggested that medical professionals should provide diagnoses constituting “proper and compelling evidence” of a qualifying disability. It also considered whether stress was an illness by reference to a personal injury authority.
For the Court of Appeal, these passages demonstrated a diagnostic approach. The central issue was not whether the documentation established a particular clinically recognised illness but whether the evidence established an impairment with the required functional consequences and duration.
The judgment does not make medical evidence irrelevant. The court expressly accepted that tribunals are entitled, and ordinarily likely, to seek medical support. Nor does it remove the claimant’s burden of establishing disability. The error was treating medical classification as an effective gateway to the statutory protection.
D. The cause of an impairment is distinct from disability status
The Tribunal had discussed whether the appellant’s symptoms were caused by work or by events associated with her disclosure. It noted an earlier period of stress-related absence predating the disclosure.
Those observations did not answer the disability question. An impairment need not have been caused by the employer, the workplace or whistleblowing to qualify under the DDA 1995. An earlier period of symptoms might bear on the evidence of duration or recurrence; it does not disqualify an impairment because its origins are unrelated to the dispute.
Causation could remain relevant to other claims. The error was importing it into the antecedent question of disability status.
E. Disability and employer knowledge must be kept separate
The Tribunal selected 8 December 2023 as the starting point for its assessment because it regarded that as the first occasion when the Trust would have been aware of the appellant’s medical issues.
The Court of Appeal held that this was the wrong test. The existence and duration of disability are assessed by reference to the person’s impairment and its effects. Employer awareness may matter when considering the reasonable-adjustments claim, but it cannot determine when the impairment began or when its effects became substantial and long-term.
This distinction matters particularly where symptoms exist before an employer receives medical information. A tribunal must not truncate the relevant history merely because disclosure to the employer occurred later.
F. Credibility findings must not become a blanket corroboration requirement
The Tribunal had found the appellant untruthful concerning the circumstances in which clinical records were obtained. The Court of Appeal considered that this finding appeared to influence its treatment of her evidence on separate matters, including the effects of her condition on everyday activities.
The concern was not that credibility was irrelevant. Rather, the Tribunal appeared to require corroboration across the appellant’s evidence because it had disbelieved her on one issue.
The practical lesson is that credibility assessment must remain sensitive to the particular evidence being evaluated. A demonstrated problem in one part of a witness’s account does not automatically supply a rule that everything else requires independent confirmation. This concern also contributed to the decision to order a fresh hearing before a new panel.
G. Adequate reasons and omitted allegations
The whistleblowing allegations had shifted during the hearing. To clarify them, a document identifying seven alleged detriments was prepared at the Tribunal’s direction and agreed by the appellant. These included disclosure of identity, ostracism, failure to investigate, attendance management, recovery of a salary overpayment and dismissal.
The court considered that the Tribunal had, for the most part, explained its conclusions. It would nevertheless have been better to address each agreed detriment separately.
The salary-overpayment allegation was not addressed. The Trust argued that the appellant had not maintained it in closing submissions and that the supporting evidence was limited. The court nevertheless regarded its inclusion in the agreed issues as requiring a determination.
Importantly, the court did not consider this omission, standing alone, sufficient to justify interference. Nor did it accept that the treatment of alleged ostracism independently warranted allowing the appeal. The judgment consequently should not be read as holding that every omitted reference necessarily invalidates a tribunal decision.
H. Informal investigation and policy-based independence
The court agreed that choosing how to investigate a disclosure is essentially a matter for the employer. It did not establish a general entitlement to a formal investigation whenever a protected disclosure is made.
However, it distinguished that choice from the appellant’s complaint that the investigation lacked independence and that its handling itself constituted a detriment.
The Tribunal had considered the Trust’s 2024 policy, although the 2018 policy applied when the investigation occurred. Both required a proportionate investigation involving someone suitably independent and trained. The difference between the versions was therefore not material to the appeal.
The line manager asked to collect statements had a pre-existing conflict with the appellant. That raised a question about whether she was an appropriate person to perform that task. The court also noted that a grievance remained outstanding when dismissal occurred.
These were reservations, not final findings of unlawful detriment, policy breach or unfair dismissal. In particular, the judgment does not establish that every outstanding grievance prevents dismissal, or that any previous disagreement necessarily disqualifies a manager from gathering information.
I. Why the whole case required a fresh hearing
The Trust proposed a narrower return to the original Tribunal. The Court of Appeal rejected that approach.
First, the appellate court had not determined that the appellant was disabled. That remained a fact-sensitive question for a tribunal correctly applying the statutory test. The case therefore could not simply proceed on the assumption that disability had been established.
Second, the court’s concerns about the original panel’s treatment of the appellant’s evidence extended beyond the disability issue. Together with the other reservations, they made a fresh hearing before a differently constituted panel appropriate.
The Tribunal’s earlier observation that the reasonable-adjustments claim would face difficulties did not cure the error. It had expressly declined to determine that claim after rejecting disability status.
6. Likely Impact
Disability litigation
The judgment provides a clear warning against using diagnostic terminology as a proxy for statutory analysis. Tribunals should identify the relevant activities, evaluate the evidence of their impairment, and address substantiality and duration expressly. Reciting the correct authorities is insufficient if the subsequent reasoning applies a different threshold.
For claimants, the decision supports presenting concrete evidence of everyday limitations alongside medical material. It does not establish that stress, anxiety, prolonged sickness absence or an inability to perform a particular job automatically amounts to disability.
For employers, uncertainty about a diagnosis should not be confused with an absence of potentially relevant functional limitations. Disability status and the knowledge questions arising within a reasonable-adjustments claim require separate analysis.
Tribunal reasoning and credibility
The decision encourages structured judgments addressing each agreed allegation and the evidence relevant to it. It also cautions against allowing one adverse credibility finding to become a general evidential barrier.
Where those problems extend across interconnected claims, correcting a single issue may be inadequate. This case illustrates why a differently constituted panel may be necessary, although it does not make that remedy automatic whenever an appeal succeeds.
Whistleblowing investigations
The judgment preserves managerial discretion over investigative format while highlighting the importance of substantive safeguards, particularly independence. Informal handling is not, by itself, unlawful; equally, calling an investigation informal does not resolve an allegation that its handling amounted to retaliatory detriment.
The findings on policy independence and the outstanding grievance remain provisional. Future tribunals must determine those matters on the evidence rather than treat this appeal as establishing automatic liability.