A Tesco spokesperson said:
We apologise sincerely for this mistake, which was made in the summer of 2011. We sell over 40,000 products in our stores, with thousands on promotion at any one time, but even one mistake is one too many.
Since then, to make sure this doesn’t happen again we’ve given colleagues additional training and reminded them of their responsibilities to ensure we always adhere to the guidelines on pricing.
More top news
More than 50 dog surfers of all breeds and sizes joined an annual dog surfing competition in California
A painting by artist LS Lowry is to go on show to the public for the first time.
A third of Olympic and world championships medals have been won by athletes with allegedly suspicious doping test results, report claims