Photographs showing a microlight aircraft moments before it crashed into a mountain killing both men aboard have been published by accident investigators.
The pictures were taken from a video camera attached to the Pegasus Quik microlight which ran into severe turbulence and crashed about 100ft below the summit of 3,850ft-high Ben More, Stirlingshire
Six snapshots taken from the video and showing the snow-capped mountain looming larger and larger featured in a report by the Air Accidents Investigation Branch (AAIB).
The pilot David Martin, 63, from Kinghorn in Fife, and his passenger Alan McCaskie, 62, from Broughty Ferry in Dundee, who was the aircraft's owner, were killed in the accident on the morning of May 12 last year.
The AAIB said: "The severity of the turbulence created by the wind, close to the summit of Ben More, was such that it exceeded the safe conditions for flight in the microlight. This resulted in a loss of control which led to the impact close to the summit of the mountain."
The report said the video showed the flight path had been stable up to a point about 300 metres from the summit. It went on: "At this point the aircraft started to roll rapidly from left to right and pitched nose-down."
The AAIB added that the increase in engine power "suggests the pilot was trying to arrest his rate of descent and climb out of the turbulence".
The report said a witness on the top of Ben More saw the last moments of the aircraft's flight and had described the wind at the summit as "very strong". When the witness removed an item of clothing from his rucksack it was nearly "ripped" out of his hand by the wind, the report said.
The AAIB said the microlight's video recordings showed that there was "no compelling visual evidence of the wind speed and direction at the summit".
The report added: "It is likely that, in this case, a lack of awareness of the wind conditions, and of the likelihood and severity of turbulence downwind of high ground were factors in this accident."