B&Q Wins Limits on AI Disclosure in Wren Trademark Clash

A London High Court has refused a request by kitchen retailer Wren to deploy an artificial intelligence image-search tool for additional evidence gathering in its ongoing trademark dispute with rival B&Q. The October 2026 ruling in B&Q Limited v Wren Kitchens Limited addressed disclosure applications within long-running infringement proceedings concerning comparative price advertising for flat-pack kitchens. Wren sought broader searches across custodians and earlier date ranges, including AI-assisted review of images from a third-party review site. Mr Justice Cawson declined the AI element, finding the proposed steps disproportionate and excessively costly relative to the issues in dispute. Limited additional disclosure was ordered on narrower points involving training materials and specific custodians. The underlying claims involve allegations of trademark infringement under sections 10(1) and 10(3) of the Trade Marks Act 1994, together with counterclaims and challenges under misleading marketing regulations. The decision underscores the court’s emphasis on proportionate case management in complex intellectual property litigation.

Small businesses facing disputes should prioritise early, targeted evidence gathering over expansive or novel technologies to control costs.