Jamie Oliver's exclusive butcher's shop had to temporarily close after inspectors found serious hygiene problems including mouse droppings, mould on carcasses and out-of-date wagyu beef.
Barbecoa, located near St Paul's Cathedral in London, closed its doors for 24 hours after public health officers scored it one out of five in January. It reopened after the issue was addressed.
On the Food Standards Agency's website, the score for the January 8 inspection is listed as one out of five with the comment: "major improvement necessary".
Carcasses hanging in basement chillers were found to have mould growing on them, slicers and vacuum packers were left dirty and expensive wagyu beef, marrow bone, oxtail, onglet, and lomo de cana, a Spanish-style pork, were found to be past their use-by dates,the Times reported.
In one case chicken breasts which had been de-boned were removed from their box, vacuum packed and relabelled with a date set for a week later, City of London inspectors said. There was no safety management system in place.