According to a tweet by Tesco,  a food safety recall is being made by Müller for batches of its yoghurt and rice products in retail stores(list of Müller products recall in pdf below).

From the screenshot

As a safety precaution, Müller are recalling some batches of Müller Fruit Corner, Müllerlight, Müller Bliss Mascarpone Style Yogurt and Müller Rice, due to the possible presence of small pieces of metal in the product.

You can find out more here digitalcontent.api.tesco.com/v2/media/homep*