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
Tesco Ireland UK, but not doing the same in Ireland. This is putting pressure on prices in Ireland as surplus poultry meat from the UK is being dumped on the market. The Irish Advertising Standards Authority in January 2009 found that Tesco Ireland advertising was misleading. Britain's Advertising Standards Authority said a leaflet produced by Tesco Ireland Ltd, was ‘‘irresponsible’’ and breached clauses in the advertising code on substantiation and weight control in May 2010. Tesco pleaded guilty and was fined, after sending unsolicited marketing emails to a number of customers and for having a problem with the email "opt-out" option. The