FULL LIST: Somerset firm Yeo Valley advises supermarkets to withdraw and recall certain products

Somerset firm Yeo Valley, which manufactured the products, has told Asda, Co-operative, Sainsbury's, Tesco and Waitrose to remove a selection of yoghurts from their shelves.

The Food Standards Agency said they posed a "possible risk to health".

Customers who have bought any of the yoghurts are advised not to eat them.

They can return to the supermarket where they were purchased for a refund.

The yoghurts include supermarket-own brands and some yoghurts from The Collective Dairy brand.

A Yeo Valley spokesman said: "Yeo Valley can confirm that a piece of rubber was found in a fruit conserve supplied by one of our suppliers.

"The supplier has identified the cause and has identified all fruit conserves, an ingredient used in fruit yogurts, that may be affected.

"Whilst the risk is considered to be low, as a precaution, we will be disposing of any potentially affected yogurts that have not yet been dispatched, as well as recalling the relevant batches of products from those affected retailers.

"Food safety and quality are paramount to Yeo Valley. We are working with the Food Standards Agency and the supplier in question to ensure it  does not happen again.

"We would like to apologise unreservedly to all customers."

The products affected are:

* Asda

Asda Extra Special Scottish Raspberry West Country Yogurt (150g); Asda Fat Free Red Cherry Yogurt (450g); Asda Fat Free Red Cherry Yogurt (four pack); Asda Low Fat Coconut Yogurt (450g); Asda Low Fat Lemon four pack Yogurt; Asda Low Fat Lemon Yogurt (450g); Asda Low Fat Mango & Passion fruit Yoghurt (450g); Collective Dairy Wild Blueberry Yoghurt (150g); Collective Dairy Wild Blueberry Yoghurt (450g).

* Co-operative

Co-op Rise & Shine Greek Style Yogurt and Raspberry (160g); Co-Op Strawberry and Raspberry Low fat Yogurts (four pack); Co-op Truly Irresistible Limited Edition Mango, Brazilian Orange and Coconut Yogurt (150g).

* Sainsbury's

Sainsbury's Basics Fruit Selection Yogurts (four pack, two strawberry and two peach); Sainsbury's Basics Strawberry Yogurt (125g)

* Tesco

Tesco Finest Strawberries & Cream Yoghurt (150g); Tesco Low Fat Coconut Yoghurt (450g); Tesco Low Fat Lemon Yoghurt (450g); Collective Dairy Wild Blueberry Yoghurt (150g).

* Waitrose

Deliciously fruity raspberry low fat yogurt (125g); Fragrant creamy Scottish raspberry yogurt (150g); Multipack Deliciously fruity low fat yogurt (four pack, two strawberry and two raspberry); The Collective Dairy wild blueberry yoghurt (450g); The Collective Dairy Wild Blueberry Yoghurt (150g).