Natasha Ednan-Laperouse, 15, collapsed on a flight from London to Nice after buying an artichoke, olive and tapenade baguette from British sandwich chain Pret a Manger at Heathrow Airport, The Sun reported.

Her father Nadim, the millionaire owner of toy store Wow Toys in Fulham, London, tried to save Natasha by giving her two doses of drugs and administering an EpiPen, but she died in hospital in France.

An inquest will take place this week with Pret a Manger bosses set to testify.

“As a family now of three, my wife, son and I are still trying to adjust to life without our beloved girl,” Mr Ednan-Laperouse said.

“It’s a daily battle and the pain is indescribable.

“Everything we say and do is a reminder that she isn’t with us; her empty bedroom, school uniform hanging in her wardrobe, her holiday bag packed for her holiday in Nice has never been unpacked. We can’t bear to.”

Natasha began to feel seriously unwell on the British Airways flight about 7.50am on July 17, 2016.

Red welts began appearing on her skin and her father administered the first of two EpiPens that she carried in case of an allergic reaction.

Despite this, she started hyperventilating and cabin crew were made aware of the situation.

She was given another EpiPen, but continued to become increasingly ill.

Natasha was laid out on the floor of the plane to receive emergency treatment and a junior doctor on board came forward to help, administering a shot of adrenaline from an on board first aid kit.

But the teen had lost consciousness and suffered a cardiac arrest.

She was given CPR but the plane was not diverted, landing in Nice after a flight lasting one hour and 50 minutes.

French paramedics met the plane and rushed Natasha to hospital, but she was pronounced dead later that day.

Natasha was a popular pupil at Lady Margaret School in Fulham and loved horses, ice-skating and hoped to become a lawyer.

The inquest could lead to product labelling laws being ramped up in the UK.

It is believed the Pret a Manger baguette she ate had sesame seeds baked into the dough.

Sesame is one of 14 allergens that European Union laws say must be listed in pre-packaged food made off premises.

But a loophole meant companies did not have to list it if the food was prepared on the same day in an on-site kitchen.

Instead, signs were supposed to be put up on shelves and tills to warn customers of potential allergens.

Pret a Manger said an allergen guide was provided in all shops and online that detailed the 14 declarable allergens contained in its products.

The company said at the time of Natasha’s death, there was — and still is — allergen signage on each fridge and at till points. It added before Natasha’s death, it had started to make enhancements to allergen information provided to customers and the design of the signage.

All its product shelf tickets now identify if the product contained any of the 14 declarable allergens, the company said.

A Pret spokesman said: “We were deeply saddened to hear about Natasha’s tragic death, and our heartfelt thoughts are with her family and friends.

“We take food allergies and how allergen information is provided to our customers extremely seriously.

“We will continue to do all that we can to assist the Coroner’s inquest.”

British Airways bosses will also to appear at the inquest to discuss safety procedures and staff training.

A British Airways spokesman said the airline was very sorry to hear of Natasha’s death and its “thoughts remain with her family”.

This article originally appeared on The Sun and was reproduced with permission.