Good effort but not what I was expecting

Worthenshaws make frozen desserts. The chocolate one tastes like watered down chocolate milk. It doesn't taste very nice. They claim they are free from nuts, dairy, gluten, soya and eggs - one of the reasons why the owner states on the actual tub that her son has nut allergies so he can eat it. Yet there is an allergen advice on the side stating its produced in a factory that handles nuts, soya, wheat, milk, gluten and egg? So can you eat it if you have a nut allergy or not?