If you bought a box of Tesco bran flakes recently – you should probably return them: the supermarket giant is now warning that some packs may contain small pieces of plastic "due a production fault".

It's just the 1kg size that is under scrutiny: the batch codes to look out for are 52320953, 52320953A, 52330953, and 52340953. They'll all also have a best before date of May 2016 on them.

The Food Safety Authority Of Ireland warns today: Tesco Ireland is recalling the above batches of Tesco Bran Flakes, as a small number of packets may contain plastic fragments. 

"No other products are affected by this recall.

"Tesco Ireland is issuing in-store recall notices requesting customers who have bought these implicated batches to return them to a Tesco store."

The cereal is all made and packaged in the UK. 

"If you have bought this product," Tesco says. "Do not eat it. Instead, return it to your nearest Tesco store for a full refund."

For more information, see fsia.ie.