15-year-old Natasha Ednan-Laperouse died after eating a baguette from Pret A Manger which contained sesame

Fast-food chains are failing to produce adequate labelling for food which contains allergens, despite the recent inquest into the death of a 15-year-old girl who died after eating baguette containing sesame, which was incorrectly labelled.

A recent report found that staff at several fast-food chains failed to correctly identify whether or not popular items had certain allergens in.

During the research, items with sesame seeds, celery and mustard were ordered to see if lessons had been learned in the wake of the inquest of 15-year-old Natasha Ednan-Laperouse who had died after consuming sesame at a Pret A Manager branch.

The allergens in the foods selected were among 14 which firms are required to list. In each outlet tested, staff were asked if the products contained allergens. Seven of the 15 establishments failed to check the foods, warranting them as safe for consumption.

Bakery chain Greggs emerged as the most careful out of the fast food chains. When asked if an Oval Bite contained sesame, Newcastle and Walsall staff either checked the packet, a nutrition guide or with a colleague.

The Mirror reported that at a Burger King in Peckham, South East London, the reporter asked if a Chicken Royale had sesame in. The server shook her head and said 'No'. Yet the bun does.

Staff at a Burger King in Peckham failed to give the correct advice regarding a sesame bun

At a nearby KFC, staff were asked if a Fillet Burger contained sesame – again, it has it in the bun.

The server replied, 'I don't know', before asking a colleague, who told her there was no sesame.

At a South London branch of Subway, staff were asked if a six-inch Teriyaki Chicken Breast Sub on Italian bread contained the allergen. He replied: 'No, there is no sesame in that bread.' But it is in the meat filling.

The various chains were visited in a bid to find out if they were correctly labelling foods which contained allergens

Correct allergy advice was given at McDonald's in Peckham. However in Newcastle, a Spicy Chicken Wrap was ordered, asked if it contained celery, the server said 'No' and listed the main ingredients.

McDonald's said: 'We recently rem­­inded and reiterated all of our restaurants and crew about procedures.' It said an allergen booklet was available in each branch, with allergy information on its app, ordering systems and tray liners.'

At Domino's Pizza in Gateshead, staff were asked about the celery in a Texan BBQ pizza. The assistant did not check the nutrition leaflets and listed toppings.

KFC said they try to make allergen information as visible as possible across their branches

Domino's apologised for its Gateshead team's mistake, adding: 'Allergen information is available via our website, app and also through leaflets in store.'

It said celery is in its BBQ sauce, with relevant products listed, with no sesame used.

In Walsall, West Midlands, Domino's staff provided the reporter with a booklet to check through the ingrediants. At a KFC in the town, correct advice was given. Yet when asked if its Chicken Fillet Tower Burger had celery, a server at its Newcastle branch said: 'No, just lettuce.'

McDonald's (pictured) said the company had recently rem­­inded and reiterated all restaurants and crew about procedures when it comes to allergens

The city's Subway and Nando's gave correct advice, though Burger King staff there gave incorrect mustard advice on its Crispy Chicken Burger. They said there was no mustard on the burger, whereas staff at the chain's Walsall branch gave correct information on the allergen.

Subway said: 'We take this matter very seriously and are immediately following up with all stores to ensure customers receive accurate information via access to clear information in store'.

KFC said: 'We try to make allergen information as visible as possible. When asked, our teams are trained to direct customers to full details on tray liners.

'That information is also available on our website or app. We'll certainly follow up with all of our restaurants.'

Burger King UK said: 'Communicating allergens clearly is a top priority. We are proactively working with franchisees to reinforce current procedures. We continually review training procedures to ensure allergen standards are upheld.'