Waitrose has issued a product recall for certain packs of black olives after tests revealed contamination with listeria, a bacteria that can cause serious illness. The affected items are 120g packets of Waitrose Essential Pitted Black Olives with use-by dates of September 13, 19, and 27, 2026. Customers who purchased these packs are advised not to consume them and to return them to any Waitrose store for a full refund. Listeria infection can cause flu-like symptoms, such as fever, muscle aches, chills, nausea, and diarrhea. In rare cases, it can lead to more severe conditions like meningitis, which is an infection of the membranes surrounding the brain and spinal cord. This is the second recall issued by Waitrose in recent days. Earlier this week, the supermarket recalled its Rhubarb Crumble due to incorrect labeling. The product contains oats, which are a source of gluten, but this was not indicated on the packaging. This poses a risk to people with allergies or intolerances to oats or gluten, or those with coeliac disease, a condition where the immune system reacts to gluten. The 500g packs of Rhubarb Crumble have a use-by date of August 19, 2026, but can be frozen and consumed within one month of freezing. Only this specific product and batch are affected. Waitrose has apologized for the inconvenience and said it was necessary to recall the item. In a similar move, Tesco has also issued a recall for one of its products due to incorrect labeling. The Tesco Finest Caesar & Smoked Bacon Coleslaw has been recalled because some packs may contain Tesco Finest Four Cheese Potato Salad instead. The potato salad contains mustard, which is not listed on the label, posing a risk to those with a mustard allergy. Only the 270g packets of coleslaw with a use-by date of September 4 are affected. Customers with a mustard allergy are advised not to eat the product and to return it to a Tesco store for a full refund, even without a receipt. These recalls highlight the importance of accurate labeling in food products, as even small errors can pose significant health risks to vulnerable individuals. Both Waitrose and Tesco have emphasized their commitment to customer safety and have taken swift action to address the issues.