BEagle, I think you have a genuine point.
In terms of Duty of Care wouldn't
all aircrew have to obtain a Food Safety/Hygiene Certificate? Otherwise, how can they provide their own sandwiches prepared to the proper guidelines?
There would also have to be adequate facilities to store the sandwiches until flight time and of course they would have to be labelled appropriately.
At least I'll know for certain what's in my butties from now on!