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 only Tesco shop format in the UK that does not include the word Tesco in its name. The brand, along with the original shops, formed part of the T&S Stores business but, unlike many that were converted to Tesco Express, these kept their old name. Subsequently, other shops bought by Tesco have been converted to the One Stop brand. Some have Tesco Personal Finance branded cash machines. The business has attracted some controversy, as the prices of groceries in these shops, often situated in more impoverished areas, can be higher than nearby Tesco branded shops, highlighted in "The Times" 22