A coroner has ruled that there were "gross failures" by the British Ministry of Defence in the deaths of three British Army reservists who died during an SAS test week march on a Welsh mountain.
Lance Corporals Craig Roberts and Edward Maher and Corporal James Dunsby died after the incident on 13 July 2013.
Delivering her ruling, Coroner Louise Hunt said there were "systemic failings" by the MoD, highlighting a lack of preparation and poor organisation on the day of the event.
But she said the failures did not amount to unlawful killing or neglect.
The coroner concluded that LCpl Roberts and LCpl Maher died of hyperthermia, while Cpl Dunsby died of major organ failure related to hyperthermia.
She said the three men and others taking part in the march had been "inadequately briefed" before they set off.
It was one of the hottest days of the year with temperatures reaching 27C and humidity at times reaching more than 80%.
The soldiers had to complete a 16-mile march, over the Pen y Fan mountain in Brecon Beacons range, in 8 hours 45 minutes as they neared the end of an arduous six-month selection process believed to be the toughest in the world.
The coroner said those in charge of the event had not been adequately prepared and briefed and the increased risk of heat illness "had not been appreciated".
She said checkpoint checks were inadequate and commanders failed to fully understand the significance of soldiers withdrawing through heat illness.
If MoD protocol had been followed, the march would have been stopped on three occasions, she said.
The coroner said an emergency plan listed the wrong hospital as closest to the march and that mobile phone signal problems meant 999 calls were cut off, causing extra delays.
A tracking system intended to update the movements of individual soldiers every 10 minutes was also "not fit for purpose", she said.
LCpl Roberts was found collapsed less than half a mile from the finish in an area known as VW Valley.
The VW stands for voluntary withdrawal because of the number of people who drop out at this stage.
LCpl Maher's GPS tracker showed him stationary for at least 44 minutes before anyone noticed.
He was found dead, still clutching a water bottle in one hand and bar of chocolate in the other.
It took between 40-75 minutes for Cpl Dunsby's lack of progress to be noticed.
A paramedic told Solihull Crown Court that his body temperature was 40.4C, the highest he had ever encountered.
His body "appeared to be shutting down" the paramedic said.
He was rescued from the mountain and taken to hospital but died 17 days later from major organ failure.
