The death of a British 15-year-old girl following a severe allergic reaction is a "daily battle and the pain is indescribable", her family has said.

Natasha Ednan-Laperouse's father's efforts when she collapsed during their flight from London Heathrow to Nice in 2016 were not enough to save her.

Despite the use of two epipens administered by her father, she was declared dead at a hospital in the French city later the same day.

Shortly before boarding the plane Natasha had eaten an artichoke, olive and tapenade baguette purchased from a Pret a Manger shop in Terminal 5 at the west London airport.

The bread contained sesame seeds which Natasha was allergic to - but were not listed on the ingredients.

File photo of a Pret a Manger store in London | Image: Clive Gee/PA Archive/PA Images

An inquest into her death will begin on Monday and will look at how the food chain failed to list the seeds as an ingredient.

Nadim Ednan-Laperouse issued a joint statement with his wife Tanya.

They explained how two years on from her death, their daughter's holiday bag from the trip still sits unpacked in her room.

The statement said: "As a family now of three, my wife, son and I are still trying to adjust to life without our beloved girl. 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."

They described their daughter as a girl with many friends at school "who had a strong moral compass and often showed maturity beyond her years".

An aspiring lawyer and talented ice skater, Natasha had her "best ever" summer planned.

It included a week at a youth Christian Festival in Norfolk and a two-week family holiday in Greece, as well as the break to Nice with her best friend.

The family were on a British Airways flight at the time | File photo

"You could not ask for a more wonderful daughter," her parents said in their tribute.

"She had a great sense of humour and was known for her contagious laughter - she could reduce a whole room to tears of laughter in minutes!

"She was also gentle, brave and loyal and showed great kindness and courage on many occasions."

More than 300 people attended her memorial service in December 2016 on what would have been her 16th birthday.

During the inquest the coroner will hear evidence from both the Pret a Manger store manager on the date Natasha bought the baguette, and the head of safety and compliance at the UK-based sandwich shop chain, which has 500 stores worldwide.

The captain on the British Airways flight and the flight crew who witnessed Natasha’s collapse on July 17th 2016 will also give evidence.

A BA spokesman said the company were sorry to hear of the young girl's death and that its thoughts were with the family.