TV service YouView might have to change its name after the High Court ruled it had infringed another company's trademark.
The company in question is a business broadband provider called Total, which runs an online billing system named YourView.
As well as changing its name, YouView might have to pay damages, after Mr Justice Sales ruled the two services were "confusingly similar".
YouView plans to appeal.
"We plan to appeal against the court's decision, as we maintain there is no confusion between our consumer-facing TV service, YouView, and the business-to-business billing platform, YourView, provided by Total Ltd," YouView said in a statement.
Total, which is based in the south west of England, felt differently. Its lawyer Paul Gordon said: "Total's rights were plainly infringed and it had to stand firm against a much larger and better-funded opponent.
"The judgement of Mr Justice Sales has vindicated Total's position. It shows that the courts of this country will protect parties against businesses such as YouView who infringe intellectual property rights.
"YouView were made well aware of Total's rights before they launched the service under the infringing name yet they chose to launch it under that name regardless."
Total secured the rights to the YourView name almost a year before YouView registered its name. Total is seeking an injunction to prevent any further uses of the YouView name.