2013 horse meat scandal only found more than 1% horse DNA in Asda's tins of but it also contained four ppb of phenylbutazone, marking the first time since the start of the scandal that bute had been detected in a meat product in the UK food chain. However, one problem raised was over documentation; all of the UK animals with phenylbutazone contamination tested in early 2013 possessed a "horse passport" that allowed the carcasses to be sold for human consumption. The veterinary residues committee (VRC) reminded the public in July 2012 that it had been "repeatedly expressing concern" about phenylbutazone contamination. and recent discoveries
Tesco books, clothing, electronics, furniture, toys, petrol, software, financial services, telecoms, and internet services. In the 1990s Tesco repositioned itself from being a down-market high-volume low-cost retailer, to one designed to attract a range of social groups by offering products ranging from low-cost "Tesco Value" items (launched 1993) to its "Tesco Finest" range. This broadening of its appeal was successful and saw the chain grow from 500 shops in the mid-1990s to 2,500 shops fifteen years later. Tesco is listed on the London Stock Exchange and is a constituent of the FTSE 100 Index. It had a market capitalization of approximately