The driver of a boat which killed a girl he had been towing was unaware she had fallen in the water, a marine report has said.

A ski boat ran over Mari-Simon Cronje, 11, at Princes Club Water Sports Park in Bedfont, west London.

Its propeller caused severe injuries in the accident on 11 September 2010.

The use of safety procedures was “flawed at every level” at the water park, the Marine Accident Investigation Branch (MAIB) said.

Mari-Simon, from London, fell from a “banana boat” – an inflatable yellow craft towed behind a speed boat – at a birthday party.

She was pronounced dead soon after arriving at hospital.

“The implementation and execution of the safety management system used at Princes Club was flawed at every level and had not identified or controlled the risks to children taking part in banana boat rides effectively,” the report said.

The boat’s driver did not see the girl as he continued on a tight circular route, it said.

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