The 55-year-old believed she could have died had she not stopped eating it and is now calling on the supermarket to reconsider its labeling of the product as it had no specific mention of cod.

"I was lucky I stopped eating it after just four mouthfuls," said Ms Patterson, who runs a business buying and selling secondhand goods.

"Cooking for six kids means I usually prepare most of the meals myself but it had been a busy day so just picked up the fish pie for tea. I first realised I was allergic to cod when I was 11-years-old and was ill for three days. I have never eaten it or had an allergic reaction in all these years and I love seafood more than anything else.

"I have always been very careful and read the labels. The product listed that it included haddock but did not say anything about cod. It did say the words 'whitefish' but if you can put haddock on the label, why can't they say cod as well?"