Patent – Practice. The claimant company, TT, was the proprietor of a patent for a ticketing system. It entered into a dispute with the defendant company, BB, as to whether BB needed to use its ticketing system and intimating patent infringement proceedings. BB sought pre-action disclosure of information from TT, including the prices of licensing its system to its various customers. TT resisted the application. The Patents Court held that the rules in CPR 31.16(3) were satisfied and that it was appropriate to exercise its discretion with regard to licences issued by TT in the transport sector.