Please can everyone stop saying make your own sandwiches if you are allergic as if it's never occurred to people with allergies to do this, my son has allergies I prepare as much as I can but going through airport security you are not always allowed food through and we have been delayed where we have had to buy food . You cannot always have enough food on you for every eventuality
This is true, but in this case, Natasha apparently just trusted to Pret.
If Pret and other places were to tighten up labelling, they will most likely do so defensively ie label everything ‘may contain traces of nuts’, so people with severe allergies wouldn’t be able to eat their stuff anyway,
A friend of mine runs a free from chocolate company in the US - free from dairy, gluten, nuts, sesame etc. The reality of that is a factory that has none of these items in ever, workers are not allowed to bring food from home in case of accidental contamination. And they have their own distribution lorries. If Pret or M&S etc were to produce guaranteed allergen free food they would have to have separate premises to make them.
Without that you really can’t guarantee no cross contamination or mistakes.
Tighter rules are never going to be a safety blanket and shouldn’t be treated as such.