A balloon has been found to be the cause of a light aircraft crash at Herne Bay's airshow in Kent.
According to the Air Accidents Investigation Branch it became lodged in its engine at last year's event, forcing the pilot to ditch the plane at sea.
The pilot managed to avoid both spectators and swimmers.
Spectators waded in to the water to help the pilot who was face down in the water.
Safety action has been taken to prevent similar incidents in the future.