2013 horse meat scandal negative for horse DNA. products were tested but were negative for all foreign DNA. Of the 37% of beef products tested positive for horse DNA, Tesco's inexpensive Everyday Value Beef Burgers tested at 29.1%. All other reported brands had less than 0.3% horse DNA. These products originated from Liffey Meats and Silvercrest Foods in Ireland and Dalepak Hambleton food processing plant in the United Kingdom. Trace amounts of horse DNA were also found in raw ingredients imported from Spain and the Netherlands. Laboratory DNA investigations were requested by the authorities into possible donkey meat adulteration of minced meat products labelled
Criticism of Tesco but Tesco backed down. Tesco has been subject to several claims of apparently out-of-date food being 'back-labelled' to appear still to be within date, poor café hygiene and a staff member contracting legionnaires' disease in the Wrexham store. Tesco denied squeezing its suppliers in December 2013 after retail analyst Cantor Fitzgerald accused Tesco of practices that risked breaching the Groceries Supply Code of Practice and criticized its trading relationships. Similar accusation were also made in April 2005 despite its record £2 billion profit. In May 2004, Tesco announced it was reducing sick pay in an attempt to reduce levels of