Four men who perished in a crash between a light plane and a helicopter just moments after both took off from flight school died accidentally, a coroner ruled.
Savaan Mundae, 18, Jaspal Bahra, 27, Thanh Nguyen, 32, and Michael Green, 74, died after their aircraft collided over historic Waddesdon Manor, Buckinghamshire.
Vietnamese military officer Mr Nguyen was receiving training from Cpt. Green who was piloting the Guimbal Cabri G2 helicopter which took at 11.45am on November 17, 2017.
But at noon their rotor sliced through the tail of the Cessna 152 plane at 1,000ft, piloted by Mr Bahra who was giving a flying lesson to Mr Mundae, a student at Bucks New University.
Captain Mike Green, pictured, was flying the helicopter with Mr Nguyen (right) which was involved in the fatal crash
Savaan Mundae (right), 18, had been taking a flying lesson from Jaspal Bahra (left) before the crash with a helicopter
A plume of smoke was seen over the woodland shortly after the two aircraft came down on November 17, 2017 close to Waddesdon Manor in Buckinghamshire
The horrific crash took place over the Waddesdon Estate - the former country seat of the Rothschild banking dynasty.
The inquest in Beaconsfield, Buckinghamshire, heard that both had taken off from Wycombe Air Park, also known as Booker Airfield, about 20 miles away from the crash site.
The incident triggered an investigation by the The Air Accidents Investigation Branch (AAIB), assisted by Thames Valley Police.
An AAIB report published almost one year after the crash concluded: 'The opportunity for the occupants of either aircraft to see the other was limited because, although they were in proximity for some time, they were both following a similar track and were not in each other's field of view.'
Coroner Crispin Butler told the hearing the helicopter, carrying Mr Green and Mr Nguyen, took off at 11.45am from Wycombe Air Park.
It was followed one minute later by the light aircraft in which Mr Mundae and Mr Bahra were flying, before both aircraft collided around noon.
The aircraft came down near Upper Winchendon near Aylesbury, to the north west of London
This Cessna 152 had instructor Mr Barha and Mr Mundae on board. Mr Mundae was studying to become a commercial pilot at Bucks New University
Cpt. Green was flying this Guimbal Cabri G2 helicopter with Vietnamese military officer Mr Nguyen
Giving evidence to the coroner, Home Office forensic pathologist Alexander Kolar told the hearing that all four of the deceased had suffered multiple severe injuries in the crash and offered causes of death of multiple injuries for each.
He told jurors: 'This man (Mr Mundae) has died as a result of multiple injuries, widespread non-survivable blunt force injuries and the injuries he has are very severe - almost extreme force.
'The types of injuries suggest he died extremely rapidly and there was limited bruising. I simply can't see two patterns of injuries across the collision and on impact falling to the ground.'
He offered causes of death of multiple injuries for each victim in the collision and explained the 'unsurvivable' wounds were severe to the point of extreme and noted examination of the brain, heart and other organs had ruled out the potential of natural causes contributing to, or causing, the mid-air collision.
The jury heard a witness, Rupert Hill, was out pigeon shooting at the time of the collision and described the horrific moment he watched the shower of debris plummeting down from the sky.
Aerial footage from above shows the wreckage after the helicopter and plane collided in mid-air
A police forensics tent can be seen erected over the site after the aircraft plummeted near to the Waddesdon Estate
A piece of fin, thought to be the tail-end of the small Cessna plane after the fatal crash
Mr Mundae, pictured, was just nine weeks into his flight training course when he died
'My attention was drawn to something in the sky but I could see lots of debris falling to the floor and the sound of an engine revving to the max. I would say I was looking at this from one to one-and-a half miles away.
'I decided it was not a helicopter, but the main body of the plane - along with all of this, I saw another aircraft, a helicopter. All of this lasted