Last week we paid attention in the PotatoPro Newsletter to metal detection. This news reminds us of the importance:
Terri, aged 18, found the two inch shard cooked inside a crisp in a bag of Roysters she had just opened for her three-year-old brother.
The matter was brought to the attention of United Biscuits - the brand's manufacturer - who asked to send back the foreign body for inspection.
A United Biscuits spokeswoman said the company believed it to be an "isolated incident".
She said: "We are very sorry to hear of the complaint from Ms Busfield concerning a packet of Roysters crisps. As a responsible food manufacturer, United Biscuits takes the quality of our products extremely seriously and has stringent quality assurance and metal detection procedures in place.
"There are clearly established procedures that we follow to help us identify the exact nature of the problem.
"We are in touch with the family and have asked them to return the packet of crisps so we can conduct an investigation."
A United Biscuits spokeswoman said the company believed it to be an "isolated incident".
She said: "We are very sorry to hear of the complaint from Ms Busfield concerning a packet of Roysters crisps. As a responsible food manufacturer, United Biscuits takes the quality of our products extremely seriously and has stringent quality assurance and metal detection procedures in place.
"There are clearly established procedures that we follow to help us identify the exact nature of the problem.
"We are in touch with the family and have asked them to return the packet of crisps so we can conduct an investigation."