Investigations into her death revealed that she suffered a cardiac arrest on May 11th while she was studying in her bedroom. Her mother rushed her to emergency and she died within a couple of hours at the hospital.
Dr Roy Palmer, the coroner, told the hearing at Croydon Coroner's Court: "She had no significant medical history. She was a fit, sporty child with no history of drink and drugs. She and her family had been out together during the day on a family outing. When they returned home she went to her room to study, but when her mother went up to see her she found her unresponsive on her bed. An ambulance was called at 10.38pm, and arrived at 10.45pm. They found her on the floor unresponsive and started CPR. She was brought in to Croydon University Hospital at 11.38pm, where they worked on her through a number of cycles but sadly couldn't do anything. She was pronounced dead at 12.20am."
Toxicology reports were also negative. A post-mortem examination revealed that Arabella had a normal heart. Investigations concluded that her death was a result of SADS or sudden adult death syndrome.
SADS or sudden adult death syndrome points to genetic heart conditions that can cause sudden death in young and otherwise healthy people.