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 shots (or an appropriate image, such as a car when advertising petrol) against a white background, with a price or appropriate text (e.g., "Tesco Value") superimposed on a red circle. Tesco's in-shop magazine is one of the largest-circulation magazines in the United Kingdom, with a circulation of 1.9 million . In November 2013, Tesco announced they would introduce face-scanning technology developed by Amscreen at all of their 450 UK petrol stations to target advertisements to individual customers. Criticism of Tesco includes allegations of stifling competition due to its undeveloped "land bank", and breaching planning laws. The Tesco supermarket chain is