Carlos Criado Perez, chief executive of UK supermarket group Safeway , told an audience of retail experts gathered at yesterday's annual convention of the Institute of Grocery Distribution that there was no reason the arrival of US giant Wal-Mart should "massacre the UK retail sector," as customers want more stimulation than the group's famous "everyday low pricing." It was an interesting statement from Criado Perez, who served for over a year as chief operating officer for the international division of Wal-Mart before joining Safeway in August 1999.The Safeway boss firmly denied that Wal-Mart had cornered the market for non-food, which is true, because most of the large multiples have geared up their non-food ranges in the last year or so.