What is whistleblowing?
Whistleblowing is the term used when a worker reports certain types of wrongdoing that are in the public interest. In UK employment law, it is formally known as making a "protected disclosure" under Part IVA of the Employment Rights Act 1996, inserted by the Public Interest Disclosure Act 1998.
The legislation exists to encourage workers to speak up about serious wrongdoing without fear of losing their job or being treated badly as a result. For employers, understanding these protections is essential because the consequences of getting it wrong are severe. Whistleblowing dismissal claims have no qualifying service period, no compensation cap, and a reputation for generating significant awards.
This guide explains what qualifies as a protected disclosure, who is protected, and how to handle a disclosure properly when you receive one.
What qualifies as a protected disclosure
Not every complaint or concern raised by an employee amounts to whistleblowing. To qualify as a protected disclosure, the worker must disclose information that, in their reasonable belief, tends to show one or more of the following six categories of wrongdoing:
A criminal offence has been committed, is being committed, or is likely to be committed. This covers a broad range of conduct, from fraud and theft to health and safety offences and bribery.
A person has failed, is failing, or is likely to fail to comply with a legal obligation. This is the widest category and the one most commonly relied upon. It covers breach of contract, breach of statutory duty, and failure to comply with regulatory requirements.
A miscarriage of justice has occurred, is occurring, or is likely to occur. This relates to situations where the legal system has produced an unjust outcome.
The health or safety of any individual has been, is being, or is likely to be endangered. This covers workplace safety issues but also extends to risks to the public.
The environment has been, is being, or is likely to be damaged. This includes pollution, illegal waste disposal, and other environmental harm.
Information tending to show any of the above has been, is being, or is likely to be deliberately concealed. This catches cover-ups of the other five categories.
Two important points. First, the worker must disclose "information," not merely make an allegation. Saying "I think the manager is committing fraud" is an allegation. Saying "I have seen the manager submitting expense claims for journeys that did not take place" is information. In practice, the boundary between the two is often blurred, and tribunals take a pragmatic view.
Second, the worker must have a reasonable belief that the information tends to show one of the six categories and that the disclosure is in the public interest. "Reasonable belief" does not require the worker to be correct. If they genuinely and reasonably believe the information shows wrongdoing, the disclosure is protected even if the wrongdoing turns out not to have occurred.
Who can blow the whistle
The protections extend beyond employees. The following categories of worker can make a protected disclosure:
- Employees on any type of contract (full-time, part-time, fixed-term, zero-hours)
- Workers who are not employees but work under a contract to provide personal services
- Agency workers
- Trainees on work experience or vocational training
- NHS practitioners, including GPs, dentists, pharmacists, and opticians
- Police officers
The protection does not extend to genuinely self-employed contractors or volunteers (unless they fall within a specific category above). However, the question of whether someone is a worker or genuinely self-employed is itself a common area of dispute. For more on this distinction, see our guide on employee vs contractor employment status.
There is no minimum length of service required. A worker can make a protected disclosure on their first day.
Protection from detriment and dismissal
Workers who make a protected disclosure are protected from two types of retaliation:
Protection from detriment
Under Section 47B of the Employment Rights Act 1996, a worker has the right not to be subjected to any detriment by their employer on the ground that they have made a protected disclosure. "Detriment" is widely defined and can include:
- Being overlooked for promotion
- Being denied training opportunities
- Having responsibilities removed
- Being subjected to disciplinary action
- Being isolated, excluded, or bullied by colleagues or managers
- Receiving a poor performance review that is not justified
- Having their contract not renewed
The worker does not need to show that the detriment was the sole reason for the treatment. If the disclosure was a material factor, the claim can succeed.
Automatically unfair dismissal
If a worker is dismissed and the reason or principal reason for the dismissal is that they made a protected disclosure, the dismissal is automatically unfair under Section 103A of the Employment Rights Act 1996.
This is one of the most powerful protections in UK employment law:
- No qualifying service period. The worker can bring a claim from day one, unlike standard unfair dismissal which currently requires two years' service (reducing to six months from January 2027 under the Employment Rights Act 2025).
- No compensation cap. Unlike ordinary unfair dismissal, where the compensatory award is capped (currently at the lower of 52 weeks' pay or the statutory maximum), whistleblowing dismissal claims are uncapped. Awards can and do run into hundreds of thousands of pounds.
- Interim relief. The worker can apply for interim relief within seven days of the dismissal, asking the tribunal to order that their employment continues (or that they are re-engaged on similar terms) until the full hearing. This is a powerful remedy that can force an employer to keep paying the worker throughout the tribunal process.
The combination of no qualifying period, no cap, and interim relief makes whistleblowing dismissal claims among the highest-risk claims an employer can face.
Internal vs external disclosures
The legislation distinguishes between different types of disclosure based on who the worker reports to. This matters because the protection afforded to the worker depends on the route they take.
Internal disclosures
A disclosure to the employer or to another person who the worker reasonably believes is solely or mainly responsible for the relevant failure qualifies for protection straightforwardly. This is the route the legislation encourages, and it is the easiest for workers to rely on.
Disclosures to a prescribed person
Workers can also make protected disclosures to "prescribed persons," which are bodies listed in secondary legislation. These include regulators such as the Health and Safety Executive, the Financial Conduct Authority, the Care Quality Commission, and HMRC. To qualify for protection, the worker must reasonably believe the information and the allegation are substantially true.
Wider disclosures
Disclosures to other bodies, including the media, the police (where they are not the prescribed person), or MPs, attract protection only if additional conditions are met. These include that the worker reasonably believed the information was substantially true, the disclosure was not made for personal gain, and it was reasonable in all the circumstances. Wider disclosures are also protected where the worker reasonably believed they would be subjected to detriment if they raised it internally, or where the concern had already been raised internally or with a prescribed person without being addressed.
The practical implication for employers is clear. If you want to keep disclosures internal, where you can investigate and resolve them quietly, you need to create an environment where employees feel safe raising concerns. If employees fear retaliation, they are more likely to go to a regulator or the media, which is worse for your business in every respect.
Creating a whistleblowing policy
Every employer should have a whistleblowing policy. It is one of the essential HR policies every small business needs, and its absence sends a message to employees that speaking up is not welcomed.
A good whistleblowing policy should include:
A clear statement of commitment. Explain that the organisation takes whistleblowing seriously and that workers who raise genuine concerns will not be penalised.
What qualifies. Describe the types of concerns covered (the six categories of qualifying disclosure) in plain language. Give practical examples relevant to your industry.
How to raise a concern. Set out the reporting channels available. Ideally, provide multiple routes, such as a line manager, a senior manager, an HR contact, or a dedicated whistleblowing email address. If the concern involves the person the worker would normally report to, there must be an alternative route.
Confidentiality. Explain that the worker's identity will be kept confidential as far as possible, but that absolute confidentiality cannot always be guaranteed, particularly if the matter proceeds to a formal investigation or legal proceedings.
How the concern will be handled. Describe the process: acknowledgement, investigation, feedback to the whistleblower. Set timeframes for each stage.
Protection from retaliation. State clearly that any worker who raises a concern in good faith will be protected from detriment, and that anyone found to have retaliated against a whistleblower will face disciplinary action.
External reporting. Inform workers of their right to report concerns to prescribed persons if they feel unable to raise them internally.
Include the policy in your employee handbook and ensure every worker knows it exists. Review it regularly and update it as the law changes.
How to handle a disclosure when received
When an employee or worker raises a concern that may be a protected disclosure, how you respond in the first few hours and days is critical. A poor initial response can escalate the situation and increase your legal exposure.
Take it seriously. Even if the concern seems minor or unfounded, treat it with respect. Thank the worker for raising it.
Record the details. Document what the worker has told you, as accurately as possible, including the date, the nature of the concern, and any evidence they have provided.
Assess the concern. Determine whether the disclosure falls within the six qualifying categories. If it does, it should be treated as a potential protected disclosure regardless of how the worker has framed it. Workers do not need to use the word "whistleblowing" for the protections to apply.
Investigate. Conduct a thorough workplace investigation into the concerns raised. The investigation should be proportionate, timely, and impartial. Appoint an investigator who has no connection to the matter.
Keep the whistleblower informed. Provide regular updates on the progress of the investigation and its outcome, subject to any confidentiality constraints. Workers who raise concerns and then hear nothing back lose trust in the process.
Protect the whistleblower. Monitor the worker's situation to ensure they are not subjected to any detriment as a result of their disclosure. If colleagues or managers are treating them differently, intervene promptly.
Do not retaliate. This may seem obvious, but retaliation can be subtle and unintentional. A manager who is unhappy about the disclosure might unconsciously give the whistleblower less favourable work assignments, exclude them from meetings, or be less supportive in performance reviews. Train your managers to recognise and avoid these behaviours.
The connection to the Equality Act
Whistleblowing and discrimination protections can overlap. For example, an employee who reports sexual harassment in the workplace may be making both a whistleblowing disclosure (if the harassment amounts to a criminal offence or breach of legal obligation) and a complaint under the Equality Act 2010. Both sets of protections would apply, and a dismissal or detriment could give rise to claims under both frameworks.
This overlap means that employers need to consider multiple legal protections whenever a worker raises a concern. Taking a narrow view of the complaint and addressing only one aspect of it can leave you exposed on the other.
How Rebox HR can help
We help employers develop robust whistleblowing policies, train managers on handling protected disclosures, and support businesses through the investigation process when a concern is raised. Whether you need retained HR support for ongoing guidance or ad-hoc HR services for a specific situation, we can help you respond correctly and protect your business.
If you have received a whistleblowing disclosure and are unsure how to handle it, or you want to review your policies to make sure they meet current legal requirements, book a free consultation and we will help you get it right.
