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Miklaszewicz v Stolt Offshore Ltd

In a whistleblowing claim, what matters is when your employer punished you.

The ruling

Whistleblowing protection runs from the date your employer punished you, not the date you first raised the concern.”

In a whistleblowing claim, the clock runs from when your employer subjected you to detriment, not from when you made your disclosure.

  • Write down when you raised your concern and what changed in how you were treated afterwards. The connection between the two is what any claim turns on.
  • A disclosure made years ago does not close the door. If the detriment happened recently, you may still have a live claim.
  • Whistleblowing detriment claims have strict time limits. Get advice as soon as you suspect the two are connected.
Read the full case

The situation

An employee disclosed suspected tax fraud by his employer to the Inland Revenue, years before the whistleblowing protections in the Public Interest Disclosure Act 1998 existed. He was later dismissed by the same employer, after those protections came into force. The employer argued the dismissal fell outside the law because the original disclosure predated the Act.

What the court found

The Court of Session disagreed. What matters for jurisdiction is the date your employer subjects you to detriment, not the date you made the disclosure. Because the dismissal happened after the Act came into force, it did not matter that the disclosure itself came years earlier.

Full citation

Miklaszewicz v Stolt Offshore Ltd | [2002] IRLR 344 | Court of Session | 2002

Last reviewed 4 July 2026