Pret a Manger is to list all ingredients on freshly made food following the death of Natasha Ednan-Laperouse.
Natasha Ednan-Laperouse went into cardiac arrest after she had an allergic reaction to a Pret baguette at Heathrow airport.
Pret chief executive, Clive Schlee, said the firm was “deeply sorry”.
“I said we would learn from this tragedy and ensure meaningful changes happen.”
“I hope these measures set us on course to drive change in the industry so people with allergies are as protected and informed as possible. Nothing is more important to Pret right now.”
The current law means that fresh, handmade and non-pre-packaged food does not have to be individually labelled, according to the UK’s Food Regulations 2014.
Theresa May called for a review of food labelling laws on Tuesday.
“We have obviously to look at this issue, we have to look at the responsibility of individual companies as well,” said the prime minister.
Pret said that “full ingredient labelling will be introduced to all products that are freshly made in its shop kitchens. The labels will list all ingredients, including allergens.”
The chain will introduce full ingredient labelling from next month and roll it out to all UK outlets as soon as possible.
Michael Gove has also said that the current loophole in the law “needs to be addressed”.
“We need to look at the whole suit of protections that we give people in order to ensure that all of us can feel safe when buying food, and that our children are safe as well… to ensure that we’ve got safe food that everyone should have a right to.”