# Whistleblowing: protected disclosures under PIDA

> **Key takeaway:** Qualifying disclosure: information + reasonable belief of listed wrong + public interest (s.43B). Right gateway ss.43C–H. Detriment s.47B; auto-UD s.103A (no qualifying period). Chesterton (public interest); Kilraine (information).

- **Jurisdiction:** England & Wales
- **Practice area:** Employment
- **Last reviewed:** 2026-08-04
- **Interactive page:** https://kttclegal.info/library/notes/Employment/whistleblowing-pida
- **Keywords:** whistleblowing, PIDA, protected disclosure, section 103A, public interest, Chesterton, Kilraine, detriment

## What is this about?

Workers who make protected disclosures about wrongdoing are protected from detriment and dismissal under the Public Interest Disclosure Act 1998 framework inserted into the Employment Rights Act 1996. Qualifying disclosure, public interest, and prescribed recipient rules are technical and frequently litigated.

## What is the core rule?

A qualifying disclosure is a disclosure of information which, in the worker's reasonable belief, tends to show one of the listed wrongs (criminal offence, legal obligation breach, miscarriage of justice, health and safety, environment, or cover-up) and is made in the public interest (ERA 1996 s.43B as amended). Protection depends on the tier of disclosure (employer, prescribed person, wider disclosure) meeting additional conditions (ss.43C–43H). Detriment (s.47B) and automatically unfair dismissal (s.103A) remedies follow if the reason/principal reason is the protected disclosure. No qualifying period for s.103A dismissal claims.

## What are the elements or test?

1. Worker status for PIDA purposes?
2. Disclosure of information (not merely allegation/allegation without content)?
3. Reasonable belief in listed wrong + public interest?
4. Correct gateway (internal/prescribed/wider) conditions satisfied?
5. Causation: detriment or dismissal because of the disclosure?
6. Remedy: compensation uncapped for automatic unfair dismissal

## Which authorities matter?

- **Employment Rights Act 1996, ss.43A–43L, 47B, 103A (PIDA framework)** — Core statutory scheme for protected disclosures and remedies.
- **Chesterton Global Ltd v Nurmohamed [2017] EWCA Civ 979, [2018] ICR 731** — Court of Appeal guidance on the public interest requirement after the 2013 amendment.
- **Kilraine v London Borough of Wandsworth [2018] EWCA Civ 1436, [2018] ICR 1850** — Disclosure must have sufficient factual content and specificity to be information.

## How does this apply in practice?

Prescribed persons lists are updated by order — check current list for regulators. Concurrent discrimination or ordinary unfair dismissal claims may be pleaded. Settlement agreements have constraints regarding future disclosures in some contexts — specialist drafting required.

## What are common pitfalls?

- Treating a grievance about personal contract terms alone as automatically a protected disclosure without public interest
- Disclosing widely without meeting s.43G conditions
- Missing that s.103A needs no two-year service
- Vague allegations without 'information' content (Kilraine)

## When would a practitioner use this?

Advising employees before disclosure; defending detriment claims; drafting whistleblowing policies.

## Quick reference

Qualifying disclosure: information + reasonable belief of listed wrong + public interest (s.43B). Right gateway ss.43C–H. Detriment s.47B; auto-UD s.103A (no qualifying period). Chesterton (public interest); Kilraine (information).

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*Reference material from [KTTC Legal](https://kttclegal.info/), not legal advice. Work product supports instructing solicitors and barristers under their supervision. England & Wales.*