- 8 updates
The Co-operative Group says tests of its own-brand burgers, supplied by Silvercrest, found traces of less than 1% horse DNA in three samples and 17.7% in one sample.
Iceland's Technical Manager Trish Twohig told the Commons Environment Committee that the supermarket was "passionate about food safety" and that future product assessments would "include equine testing".
Iceland's Technical Manager Trish Twohig said she was "sorry" that contaminated meat was found in the supermarket's burgers and that they were "extremely disappointed" by the situation.
Tesco's Group Technical Director Tim Smith said the supermarket was "appalled" over the burgers that contained 29% horsemeat and they took "full responsibility" for the error.
Mr Smith told the Commons Environment Committee that the supermarket would "continue to investigate as though Tesco and not the supplier was responsible."
Irish authorities believe that "filler product" found in contaminated burgers came from Poland and was a mixture of beef and horse offcuts, the Food Standards Agency (FSA) has said.
The contaminated beef, which was sold in supermarkets, was in the form of blocks of frozen product from a Polish supplier that had been used for a year.
Investigations are going on into how long contaminated meat might have been in use, FSA chief executive Catherine Brown told the Commons Environment Committee.
Tesco has promised customers that introducing DNA checks "will set a new standard" in the testing of meat products.
The supermarket said that the discovery of horse DNA in frozen burgers shows that "in spite of our stringent tests, checks and controls, there remained a small possibility that something could go wrong and it did."
"We want to stop it ever happening again, so we are taking action to reduce that possibility still further."
The Food Safety Authority of Ireland (FSAI) found horse DNA earlier this month in beef burger products sold by Tesco and several other supermarkets.
It said most of the affected burgers contained very low levels of horse DNA, but in one Tesco sample horse meat accounted for about 29 percent relative to the beef content.
After that ABP Food Group, which owns Silvercrest, said it had never knowingly sold equine products.
Tesco says it will now introduce a "comprehensive system of DNA testing across our meat products."
The supermarket giant says it's taking action to show its customers that they can trust the quality of its food.
"We want to leave customers in no doubt that we will do whatever it takes to ensure the quality of their food and that the food they buy is exactly what the label says it is", Tesco's Technical Director Tim Smith said.
Tesco says that its investigation into how horse DNA was found in three of its frozen beef burger lines has found that its supplier used meat from outside the UK and Ireland.