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 International operations It currently operates from 450 stores. Tesco Poland sells various brands including its own branded line of products as well as regional produce, petrol, personal finance services and on-line photo processing. In August 2008 Tesco opened the first Extra store in Poland located in Częstochowa. Currently there are 27 Tesco Extra stores in Poland. Tesco Slovakia opened in 1996 as part of Tesco's international expansion aims. It now operates from 123 stores. Tesco Slovakia has recently put great emphasis on organic products. However, Tesco Slovakia caused controversy amongst the Slovak government when it was found to have come foul of