I’m sorry but someone was responsible.
I worked in a school kitchen before I retired and we knew every child with an allergy whether it was dairy, nuts or gluten intolerant and we had different areas for food prep also a list of names of who had what allergies.
It was a small school with just over 100 children attending but obviously much bigger than a nursery.
With the nut allergies ALL children were banned from bringing anything that contained nuts such as Nutella or pastries containing nuts and obviously bags of nuts too.
Someone was neglectful at that nursery.
Either the person who gave the yogurt to the baby without reading the instructions or the person who failed to point it out.
Surely there was a list of who had what allergies on the wall in the kitchen or door of the fridge.
I also worked in a care home at one time where some of the residents had to have a thickening agent in their drinks as they could have choked to death without it.
Their names were on a list in the kitchen which had to be checked EVERY day/night as it was subject to change.
This amounts to negligence.
I wonder if the people saying nobody should be blamed as they were busy, under staffed and were low paid workers would say the same if it had been their baby who had died???
I think not.
SOMEONE is guilty!