According to a GS1 report called "Measuring the Impact of RFID in Retailing", all retailers surveyed saw a positive impact from implementing RFID. One of these, Marks & Spencer, has pioneered the use of RFID in the UK. Retailers reported an increase in sales between 1.5% and 5.5% through improved stock availability. Inventory accuracy improved by more than 50% with retailers reporting 93 -99% accuracy with RFID, and six of the ten companies were able to reduce total stock holding between 2% and 13%.