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 by the independent retailers group RGDATA contained allegations that Tesco overcharged customers. The report shows that customers in six Tesco stores were overcharged by an average of 3% on some items. Tesco Ireland was convicted of failing to display prices properly by the National Consumer Agency in July 2008. Tesco received criticism for bureaucratic and inflexible parking systems in its Bloomfield store in Dublin, Ireland. The Food Safety Authority of Ireland, has on a number of occasions ordered the recall of Tesco branded products, including a case of glass contamination. Environmental Health Officers served a closure order on Tesco's store