Detriment After Whistleblowing Letter: Free Template and What to Include

If you need to formally complain about detriment or retaliation following a protected disclosure, a written letter is the recommended first step — it creates a clear record and shows you're pursuing the matter formally. Below is what a strong detriment after whistleblowing should include.

What this letter needs to cover

• Reference the protected disclosure already made
• Describe the detriment with dates and facts
• State this constitutes a detriment under the Employment Rights Act 1996 section 47B
• Request immediate cessation of the detriment and a formal response
• Warn of tribunal claim if not resolved

Why detriment after a protected disclosure is treated so seriously

If you're subjected to any detriment because you made a protected disclosure (whistleblowing), this is unlawful regardless of your length of service — and if the detriment amounts to dismissal, there's no cap on compensation, reflecting how seriously the law treats retaliation against genuine whistleblowers.

What to include before you send it

• Confirmation of the original protected disclosure and when it was made
• A clear, factual account of the detriment you've experienced since
• Why you believe this is connected to your disclosure, not coincidental
• What outcome you're seeking

Timing evidence is often central to these complaints

A clear pattern showing negative treatment beginning shortly after your disclosure is significant evidence, even though timing alone isn't automatically conclusive — tribunals take a close, sudden change in treatment very seriously when assessing whether retaliation has occurred.

Frequently Asked Questions

Does my original disclosure need to have been proven correct for this protection to apply?
No — you're protected as long as you reasonably believed the disclosure was true and made in the public interest, regardless of whether it's later fully substantiated.

What if the detriment is subtle, like being excluded from meetings rather than something dramatic?
Subtle, cumulative detriment still counts — you don't need a single dramatic incident, and a pattern of smaller changes can be just as significant as evidence.

[Your Name]
[Your Address]
[Your Postcode]
[Your Phone Number]
[Your Email Address]
[Name of Recipient]
[Job Title, e.g. HR Manager]
[Company Name]
[Company Address]
[Company Postcode]
[Date]

Dear [Name],

Subject: Formal grievance – detriment after a protected disclosure

I am raising a formal grievance about how I have been treated since I made a protected disclosure (blew the whistle). Treating a worker badly because they made a protected disclosure is unlawful under section 47B of the Employment Rights Act 1996.

On [Date] I told [Name / Role] about [the concern, e.g. a breach of health and safety rules at the warehouse].

Since then:
• [Date]: [e.g. my annual leave request was refused without reason.]
• [Date]: [e.g. I was left out of the weekly team briefings.]
• [Date]: [e.g. my supervisor has been hostile and is micro-managing me.]

Please make sure this treatment stops now, investigate it under the grievance procedure, and give me a formal written response. Please also arrange a grievance meeting.

If this is not resolved, I may bring an employment tribunal claim.

Yours sincerely,

[Your Signature]
[Your Printed Name]