Supreme Court backs former employee in trade secrets case

Managing IP is part of Legal Benchmarking Limited, 1-2 Paris Gardens, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2026

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement

Supreme Court backs former employee in trade secrets case

The Court of Appeal was right to find that a former employee of mosquito net maker Vestergaard was not liable for breach of confidential information, the UK Supreme Court has ruled

In a unanimous decision, the five Supreme Court judges found that Trine Sig was not liable as she did not learn of any relevant trade secrets while employed by Vestergaard, and was not aware that such secrets were being used by an employee of her company.

Writing the Court’s judgment, Lord Neuberger said that the law must maintain a balance between protecting trade secrets and not unreasonably inhibiting competition in the marketplace. He said that IP protection is vital to economic prosperity but added: “On the other hand, the law should not discourage former employees from benefitting society and advancing themselves by imposing unfair potential difficulties on their honest attempts to compete with their former employers.”

The dispute between these two parties arose from a complex trade secrets case, in which the Court of Appeal had upheld a ruling that Vestergaard’s trade secrets were used by competitor Bestnet Europe.

Vestergaard was represented by barristers Mark Platt-Mills QC and Thomas Moody-Stuart and law firm Field Fisher Waterhouse while the respondents were represented by Alastair Wilson QC and George Hamer and law firm McGuire Woods London.

more from across site and SHARED ros bottom lb

More from across our site

Attorney Oran Friar and trainee attorney Harry Cunliffe at Reddie & Grose, share that patent filings for clinical LLMs are surging, but success in the UK and Europe hinges on demonstrating technical innovation
Implementers can use the UK courts to seek FRAND terms for patent pool licences
The first credible UPC spinouts are growing, and they are coming from elite patent litigation teams, suggesting specialist litigators may no longer need large platforms to compete
Voyage IP has hired a veteran IP leader from Spruson & Ferguson as its head of trademarks, as well as another consultant who will boost the firm’s commercial offering
Lawyers say unwritten appearance expectations can disproportionately affect women and junior talent, making proactive guidance a growing responsibility for law firm leaders
Apple’s lawsuit against OpenAI, which features Tier 1-ranked disputes firms on both sides, reflects how trade secrets litigation is becoming a prominent competition feature
Drew & Napier’s leadership appointments show one way full-service firms can back up claims about the strategic importance of IP
Strike-out application will hear claims that the copyright aspect of an IP infringement claim brought by a gambling and sports betting group should be dropped
Amongst a sea of mergers, Lathrop GPM and HG Law have set out plans to combine, positioning themselves to compete with both IP boutiques and full-service firms
Patrícia Paias explains why she loves the science and business behind an idea and why potential rights owners must avoid the ‘file and forget’ philosophy
Gift this article