Southam: A Disclosure Error Did Not Change the Whistleblowing Appeal Result

Proving a protected disclosure is not the same as proving that your employer treated you badly because of it. A whistleblowing claim also needs evidence about the treatment, its timing and the reason for it.

Southam v Berkshire Healthcare NHS Foundation Trust [2026] EAT 150 illustrates that distinction. On 1 October 2026, the Employment Appeal Tribunal identified errors in the Tribunal's reasoning about two alleged disclosures. It nevertheless dismissed the appeals because correcting those errors could not change the result.

What is a protected disclosure?

A protected disclosure is a qualifying disclosure of information about specified wrongdoing, made through a legally recognised route. Under section 43B of the Employment Rights Act 1996, the worker must reasonably believe that the information tends to show a listed kind of wrongdoing and that disclosure is in the public interest.

The listed matters include a criminal offence, breach of a legal obligation, danger to health or safety and concealment of listed wrongdoing. Further conditions govern how a qualifying disclosure becomes protected under sections 43C to 43H.

Calling a complaint whistleblowing does not establish those conditions. A request for reasonable adjustments or a disclosure of disability is not, just for that reason, a protected disclosure of wrongdoing.

What did the EAT decide in Southam?

The Tribunal had accepted some disclosures as protected. The appeal concerned, among other matters, its reasons for rejecting two further disclosures identified in the judgment as PD3 and PD9.

The EAT found errors in that reasoning. It did not go on to determine that both further disclosures were protected. Instead, it examined whether deciding that issue differently could affect the alleged detriments.

A detriment means a disadvantage or unfavourable treatment in the legal sense. The claim still required the alleged treatment to have happened and to have the necessary connection with a protected disclosure.

The Tribunal's findings left no route to a different outcome on the relevant allegations. Across the issues considered, treatment had occurred before the disclosure relied on, had not occurred as alleged, was not a detriment, or had been explained by findings that excluded the required causal link. Both the liability appeal and the reconsideration appeal were dismissed.

Why chronology matters

A particular event cannot have been caused by a disclosure made afterwards. But check which disclosure is relied on. Treatment that predates one disclosure could still need examination against an earlier disclosure if that is part of the pleaded case.

Record each disclosure separately. Keep its date, what information it contained, who received it and evidence that the relevant people knew about it. Then identify each alleged detriment and the reason you say the disclosure influenced it.

For a whistleblowing detriment claim under section 47B, the disclosure must materially influence the treatment. An automatically unfair dismissal claim under section 103A uses a different test: the disclosure must be the reason or principal reason for dismissal. Do not interchange those tests.

Close timing may be evidence, but it does not automatically prove the required connection. A legal error about one disclosure cannot rescue a claim if the remaining findings rule out liability.

What should you bring for review?

Keep the disclosure documents, subsequent correspondence and dated records of the treatment you complain about. Separate the employer's explanation from your reasons for challenging it.

The records need to show the disclosure conditions and the treatment, not only whether your complaint used the word whistleblowing.

Frances N.U