Tesco have taken out full-page adverts in several national newspapers to apologise to customers after horsemeat was found in some beef burgers, including those at a North Yorkshire plant.
The advert reads:
"You have probably read or heard that we have has a serious problem with three frozen beef burger products that we sell in stores in the UK and Ireland.
The Food Standards Agency of Ireland has told us that a number of products they have recently tested from one of our suppliers contained horsemeat.
While the FSAI has said that the products pose no risk to public health, we appreciate that, like us, customers will find this absolutely unacceptable.
We have immediately withdrawn from sale the products from the supplier in question, from all our stores and online.
If you have any of these products at home, you can take them back to any of our stores at any time and get a full refund. You will not need a receipt and you can bring just back the packaging.
We and our supplier have let you down and we apologise.
So here's our promise. We will find out exactly what happened and when we do, we'll come back and tell you."
A drug with the potential to cause cancer in humans might have entered the food chain through horse meat, Labour has claimed.
Traces of horse DNA have been discovered in a beef burgers sold in supermarkets across the UK. A Tesco burger was found to be 29% horsemeat
A list of the beef burgers, sold in UK supermarkets, that were found to contain traces of horsemeat.