THE family of a five-year-old boy whose death inspired an Island-wide movement of blue-and-yellow tributes have expressed their sadness and frustration after an inquest was unable to determine exactly why he died.

Kason Le Flahec was five years and five months old when he became ill in October 2024 with symptoms initially resembling a common childhood sickness before suffering a seizure and dying suddenly.

An inquest, held on Friday, heard that the illness was likely contributed to by an unknown underlying syndrome.

As a result, the exact cause of death was recorded as undetermined.

Ellie Le Flahec, Kason’s mother, told the JEP that, “although the inquest is ‘case closed’, for me it brings no closure”.

She added that she had noticed various symptoms in Kason during his life but never received further answers.

Kason Le Flahec’s grave decorated to mark his seventh birthday. Picture: Ellie Le Flahec

She said she had spotted a number of symptoms in her son but never received more answers.

“I sed to blame myself but I don’t anymore,” she said.

“I know it’s the health system that should have done better.”

Ms Le Flahec’s sister, Romi Le Flahec, added: “Although the case is now ‘closed’, with Kasons death being labeled as ‘undetermined’, we will always be waiting for the phone call to finally answer the question to why my beautiful nephew passed away so suddenly.”

Now 18 months on from Kason’s death, Ms Le Flahec said he would recently have turned seven, adding: “I feel like this year, since after Christmas, is when I have really started to properly grieve.”

She said that the family are considering how they will remember the youngster in the years to come.

Jakob Le Flahec honouring his brother’s love for the Minions. Picture: Ellie Le Flahec

Over the past year, Ms Le Flahec has organised fundraising events under the hashtags #KasonsDay and #blueandyellow, in tribute to Kason’s love of Minions, raising almost £7,000 for local charities – events she said she hopes to continue in future years.

With support from other fundraising efforts, Ms Le Flahec said the family had been able to install a headstone at Kason’s grave.

Meanwhile, Kason’s brother and “best friend” Jakob said he would like to install a plaque beside a tree at People’s Park, near the family home.

“[It is so] I can climb the tree for him, as he loved climbing trees. He was really brave and he can watch me climb it from Heaven,” he said.

“I miss my brother so much and I wish he was still here,” Jakob added. “He was my best friend and would always make me laugh because he was so funny.”