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 stated on his application that he had a certain job between 1967 and 1973, when he had not. 18 months later Tesco found out, and they said this was the reason for dismissal. Under the Trade Union and Labour Relations Act 1974 Sch.1, para.6, which refers to conduct during and not prior to employment, conduct prior to the start of the contract could not make the contract itself void. So Tesco was found to have dismissed Mr Johnson unfairly. During 2007, a group of Tesco employees were investigated for criticising the firm's human resources policy and its 'rude' customers on