A teenage model collapsed and died while rowing on the Thames last weekend.
Rosie Mitchell lost consciousness while rowing with Kingston Rowing Club on Saturday morning.
Paramedics were unable to revive the 15-year-old, who died in hospital shortly afterwards.
Rosie’s father Andrew Mitchell told the Evening Standard the family believed Rosie died “instantly” either from a heart attack or a brain haemorrhage.
He said they were setting up a charity called Rosie’s Fund, the cause for which is yet to be decided.
“We are devastated by the loss of our beautiful, smart and energetic daughter, who had so much potential,” he added.
Kingston Rowing Club called the incident “tragic” and said: “Our hearts go out to Rosie’s parents, Rachel and Andrew, family and friends.”
Model agency Hive Management, which represented Rosie said in a statement: “Yesterday we received the heart-breaking news that our gorgeous, rising star Rosie Mitchell passed away suddenly on Saturday.
“Rosie was only 15-years-old and had the brightest future ahead of her. We would like everyone to join us in celebrating the short life of this beautiful young woman and our thoughts and prayers go out to Rosie’s family and friends.”
Grey Court School in Richmond, where Rosie was a student, posted on Facebook: “Rosie was a wonderful girl and a model student in every way. She will be sadly missed by everyone who knew and loved her.”
The police are not treating the incident as suspicious.