[Guest Post] J Mac v Q Deck - an object lesson in unregistered designs

Katfriend Rebecca Newman (Addleshaw Goddard) comments on the recent decision in J Mac Safety Systems Ltd v Q Deck Safety Systems Ltd [2025] EWHC 2241 (Pat), where a claim for infringement of UK unregistered design right succeeded. It covers some interesting points around must-fit and the interesting feature of UKUDR where claimants can specify the design relied on. Rebecca writes:"This