Calls for change stem from the family of a teenager who died after an allergic reaction to a meal out.

The family of Celia Marsh, who had a severe dairy allergy, want more done to protect others.

More than half of firms tested by Trading Standards in Devon and Somerset break labelling rules.

Tanya Ednan-Laperouse and Emma Turay say more needs to be done as the deaths were "preventable".

The recommendations follow the death of Celia Marsh who ate a dairy-contaminated Pret a Manger sandwich.

Celia Marsh, who had a severe dairy allergy, collapsed while on a shopping trip with her family.

The trial has been set up by the family of Natasha Ednan-Laperouse, who died after eating a sandwich.

Research will look at whether commonly available peanut and milk products can treat food allergies.