The driver of a speedboat which killed two members of the same family as it raged out of control was not attached to a safety device designed to cut power in an emergency, investigators have said.
Nick Milligan, 51, the managing director of Sky's advertising sales division, Sky Media, was declared dead at the scene in Padstow, Cornwall, with his daughter, Emily, eight, following the incident on Sunday, May 5.
"The [boat] was fitted with a kill cord, but this was not attached to the driver at the time of the accident.
Consequently, when the driver was ejected from the boat, the kill cord did not operate to stop the engine and the [boat] continued to circle out of control, and at speed."
It said the boat ran over members of the family "a number of times" as it circled in the water.
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The film had formed part of a commemoration to the Choucair family, three generations of whom died in the fire.
John Nolan, who was found with cigarettes and two lighters, suffered burns on 65% of his body after being alight for around six minutes.
Known as Pily she died in January, seven months after the disaster, having suffered a stroke.