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
Criticism of Tesco justified an aggravated damages award. "Tesco Group of Companies (Holdings) v Hill" [1977] I.R.L.R. 63, a checkout lady did not ring up 18 items worth £7 in one customer's purchase. Tesco started an investigation. She said she felt ill. Tesco called the police. They dismissed her. The Employment Appeal Tribunal held that the dismissal was unfair because she was given no opportunity to state her case when she was in a fit state. "Johnson v Tesco Stores" [1976] I.R.L.R. 103, an old case under old law, the employment tribunal found Tesco to have unfairly dismissed Mr Johnson. He had wrongly