THREE major supermarkets are recalling a number of food products which contain potatoes and potentially small fragments of machinery.

Sainsbury’s, Waitrose and Morrison’s are recalling a number of food products after a batch of potatoes used as ingredients in all of them was found to contain small pieces of metal.

The affected batch of potatoes originated from a single supplier and fragments of metal found in it are thought to have come from a piece of broken down equipment.

Jason Feeney, chief operating officer at the Food Standards Agency, said: "The FSA is advising anyone who has bought these products not to eat them and return them to the shop where they were purchased.

"The pieces of metal which may be present are potentially harmful, so people should check whether they have bought any of the products."

A number of potato salad and coleslaw products were recalled on Friday, May 8 because of the potential presence of small pieces of metal.

A subsequent food chain investigation of the products by the retailers and manufacturer identified the affected batch of potatoes and the other products it was used in.

Initial investigations suggest a piece of equipment broke up on the manufacturing line, resulting in the fragments of metal going into the batch of potatoes.

The following Sainsbury's products with a use by date up to and including 21 May 2015 are recalled:

•by Sainsbury’s Classic Cumberland Pie 450g

•by Sainsbury’s Classic Liver & Bacon with Mash 450g

•by Sainsbury’s Classic Bangers & Mash 450g

•by Sainsbury’s Classic Braised Steak & Mash 450g •by Sainsbury’s Rumbledethumps 450g

•by Sainsbury’s Classic Chicken White Wine 450g •by Sainsbury’s Vegetarian Cottage Pie 400g

•by Sainsbury’s Classic Sausage & Mash Yorkshire 430g

•by Sainsbury’s Classic Cottage Pie 450g

•by Sainsbury’s Classic Cottage Pie 900g

•by Sainsbury’s Classic Shepherd’s Pie 450g

•by Sainsbury’s Classic Shepherd’s Pie 900g

•by Sainsbury’s Basics Salmon Cottage Pie 300g

•by Sainsbury’s Classic Cumberland Fish Pie 450g

•by Sainsbury’s Classic Cod in Parsley Sauce 420g

•by Sainsbury’s Kid’s Sausage & Mash 250g

•by Sainsbury’s Good Pulled Pork 380g

•by Sainsbury’s Kids Fish Pie 300g

•Taste The Difference Cottage Pie 400g

•Taste The Difference Luxury Shepherd’s Pie 400g

•Taste The Difference Steak au Poivre 450g

•Taste the Difference Cottage Pie 800g

•Taste The Difference Vegetable & Berry Lentil Pie 400g

•Taste The Difference Fish Pie 400g

•Taste The Difference Fish Pie 800g

•Basics Fish Pie 300g

•Basics Cottage Pie 300g

•Basics Shepherd’s Pie 300g

•Basics Liver & Mash 300g

•Basics Sausage & Mash 300g

•Basics Family Cottage Pie 1.5kg

•Basics Cottage Pie 1.5kg

•Café JS Cottage Pie 340g

•Café Children’s Sausage & Mash 250g x 4

•Be Good To Yourself Cottage Pie 450g

•Be Good To Yourself Shepherd’s Pie 450g

•Be Good To Yourself Chicken & Mushroom Pie 400g

•Be Good To Yourself Braised Beef & Mash 400g

•Be Good To Yourself Fish Pie 450g

•Be Good To Yourself Chicken Dinner 350g

•Be Good To Yourself Sausage & Root Veg Mash 400g

•Be Good To Yourself Nutritionally Balanced Ham Hock & Sweet Potato Mash 400g

•Be Good To Yourself Nutritionally Balanced Minced Beef Casserole 400g

No other Sainsbury’s products are known to be affected.

Waitrose has recalled its Waitrose Creamy, Golden Smoked Haddock in Cheese Sauce, 400g  with the use by dates 13 May 2015, 14 May 2015 and 15 May 2015.

No other Waitrose products are known to be affected.

Morrisons recalled: its Morrisons Carrot and Swede Mash, 500g with the use by dates 12 May 2015 to 16 May 2015 inclusive.

No other Morrisons products are known to be affected.