The Airport Authority and airline representatives ended talks yesterday still deadlocked over the issue of landing and operational charges at Chek Lap Kok airport. The airlines believe they will have to pay up to three times more fees at Chek Lap Kok than Kai Tak, while the Airport Authority says it is more likely to be twice the level. 'The latest meeting was calm, cool and collected,' an authority spokesman said. The airlines were represented by the International Air Transport Association (Iata). The carriers want more information from the airport's business plan, particularly projected revenues, expenditure and cash flows, in order to assess whether the charges are justified. 'The authority provided us with more information but we still need more in order to finalise our judgment on whether the charges are fair,' said Gilbert Chow of Northwest Airlines, who led the Iata delegation. The next meeting between the two sides has been scheduled for July 16 and 17.