Retail Stores Plc, the vehicle created to acquire Liberty Plc in July, said on Monday it had appointed Fiona Harrison as the chief executive of both Retail Stores and Liberty with effect from December 4.Harrison, who had been chief executive of Coats Viyella Plc's fashion retail division before leaving in 1998, will be responsible for re-establishing Liberty as a global luxury brand and re-focusing its retailing operations.Liberty owns a flagship store in London's West End. Retail Stores is 68 per cent owned by property company Marylebone Warwick Balfour Group Plc.(C) Reuters Limited 2000.