How do I prove that my dismissal was caused by whistleblowing?

You must demonstrate that the disclosure was the reason, or a material reason, for the detrimental treatment or dismissal. This is known as causation. It is essential to document the specific detriment or dismissal and link it directly to the protected disclosure to support your claim.

What is the deadline for starting a whistleblowing claim?

You must complete ACAS Early Conciliation, which is a mandatory step before filing a claim. You have three months less one day from the date of the detriment or dismissal to initiate this process. Failing to meet this deadline may prevent you from proceeding with your employment tribunal claim.

Can I get my job back immediately after being dismissed for whistleblowing?

If you are dismissed specifically for whistleblowing, you can apply for interim relief within seven days of the dismissal. This application seeks reinstatement pending the full hearing of your case. This is a rare procedure but provides immediate protection against the effects of dismissal while your claim is processed.

How long does a whistleblowing claim usually take?

The typical timeframe for a whistleblowing claim journey is between 12 and 24 months. This period covers the various stages, including confirming the disclosure was protected, documenting the detriment, completing mandatory ACAS Early Conciliation, and attending the employment tribunal hearing.

All Legal Journeys

Employment Law

UK-wide

5 stages

12–24 months

Reviewed 2026-05-22

Whistleblowing claim journey

Protected disclosure detriment or dismissal claim under PIDA 1998 / ERA 1996.

This page covers UK-wide law. Where local procedure differs (e.g. courts or tribunals), this is noted in the relevant section.

Who Uses This Journey

Workers and employees who have made a protected disclosure and suffered detriment or dismissal as a result.

Stage-by-Stage Timeline

Confirm the disclosure was 'protected'

Section 43A-L ERA 1996: information tending to show one of the relevant failures; reasonable belief in public interest; made to authorised person or via internal procedure first.

Document the detriment or dismissal

Causation is key — show the disclosure was the (or a material) reason for the treatment.

ACAS Early Conciliation

Mandatory.

Deadline: 3 months less 1 day from detriment or dismissal

ET1

Whistleblowing claims have uncapped compensation under s.49 ERA 1996.

Forms at This Stage

ET1

Interim relief application (rare)

If dismissed for whistleblowing, can apply for interim relief within 7 days — reinstatement pending hearing.

Deadline: 7 days from dismissal

Official Sources

Public Interest Disclosure Act 1998

Frequently asked questions

How do I prove that my dismissal was caused by whistleblowing?: You must demonstrate that the disclosure was the reason, or a material reason, for the detrimental treatment or dismissal. This is known as causation. It is essential to document the specific detriment or dismissal and link it directly to the protected disclosure to support your claim.
What is the deadline for starting a whistleblowing claim?: You must complete ACAS Early Conciliation, which is a mandatory step before filing a claim. You have three months less one day from the date of the detriment or dismissal to initiate this process. Failing to meet this deadline may prevent you from proceeding with your employment tribunal claim.
Can I get my job back immediately after being dismissed for whistleblowing?: If you are dismissed specifically for whistleblowing, you can apply for interim relief within seven days of the dismissal. This application seeks reinstatement pending the full hearing of your case. This is a rare procedure but provides immediate protection against the effects of dismissal while your claim is processed.
How long does a whistleblowing claim usually take?: The typical timeframe for a whistleblowing claim journey is between 12 and 24 months. This period covers the various stages, including confirming the disclosure was protected, documenting the detriment, completing mandatory ACAS Early Conciliation, and attending the employment tribunal hearing.