Ryanair has threatened a partial pull-out from its largest airportbase in a row over fees. The low-cost carrier said it will withdrawplanes from Stansted unless BAA, owner of the Essex airport, cuts itscharges. Ryanair issued the ultimatum as it warned that higherairport costs, plus increased taxes, were continuing to affect demandamong British customers."We will take some flights and aircraft out of Stansted this winterif there is no movement on these high costs," said Ryanair's chiefexecutive, Michael O'Leary.Ryanair is blaming BAA and the government for a recent drop in itspassenger load factor - a measure of how full its planes are. Thecarrier says a doubling of air passenger duty to £10 and a doublingof fees at Stansted to £12 a passenger has filtered through to ticketprices and affected demand. Mr O'Leary added: "Passengers aresuffering a double whammy."BAA could not be reached for comment. Mr O'Leary said Ryanair wouldstart by withdrawing 10% of its fleet from Stansted, equivalent tofour planes.The Ryanair chief also warned that the airline market was due for asevere downturn. He said there would be "blood on the walls" in thesector over the winter if the current weak sales across Europecontinued into the autumn, without summer holiday sales to shore updemand. "The market will downturn. We expect it to be in the next 12months. We just don't know what is going to cause it," he said. "Allwe know is that this business is cyclical and the down points of thecycle tend to be very deep." Ryanair underlined its concernsyesterday by launching another seat sale during its busiest time ofyear, selling 3m flights for £10 including charges and taxes, lessthan a month after it gave away 1m tickets for 1p including add-ons.The offer will cost Ryanair between £20m and £45m. "Our concern isnot so much the summer, where we already have decent visibility. Weare much more concerned about the coming winter. If those softmarkets continue it could be a very difficult winter in general,"said Mr O'Leary.Ryanair reported a 33% rise in pre-tax profits to €451m (£305m)earlier this month, but predicted growth in the current financialyear would be just 5% and said it could lose money over the winter.Its load factor fell from 82% to 80% last month, with easyJet and BAalso reporting difficulties in filling their planes.Source:The Guardian