The latest Harrods director, Xenia Carr Griffiths, who has been on the board since 1996 is to leave the luxury Knightsbridge store. In a similar bid, David Riddiford, merchandising director of Selfridges is leaving at the start of May to work for Lane Crawford, a Hong Kong department store. Selfridges has seen a string of executive changes since it was acquired by Canadian billionaire Galen Weston last year.