Further tests will be carried out concerning the deaths of two soldiers - including one who lived in London - during SAS selection training in the Brecon Beacons.
Edward John Maher and Lance Corporal Craig John Roberts collapsed on one of the hottest days of the year while climbing south Wales' highest mountain.
An inquest at Brecon Law Courts in Powys, mid Wales, gave the medical deaths of the pair as "unascertained".
A reservist who died alongside a colleague during an assessment for the Territorial Army's SAS section on the hottest day of the year was pursuing his dream, his family said today. Lance Corporal Craig Roberts died during a military exercise in the Brecon Beacons on Saturday.
In a statement issued through the Ministry of Defence today, Mr Roberts's father Kelvin said:
The family of Lance Corporal Craig Roberts, who died during the selection process for the Territorial Army's SAS section, today said they are devastated at their loss, but he had died "in the pursuit of his dream".
Staff and students at the school in which a reservist, who died over the weekend during a Territorial army assessment, have held a special assembly in memory of Lance Corporal Craig Roberts.
In a statement, Trinity College in Lewisham said:
The parents of a south east London reservist who died alongside a colleague during an assessment for the Territorial Army's section of the SAS at the weekend, have paid tribute to him today.
Lance Corporal Craig Roberts' parents Kelvin and Margaret were said to be heartbroken at their son's death. Mr Roberts told the Daily Mail:
Tributes have poured in for part-time soldier Lance Corporal Craig Roberts from Lewisham described as a "true gentleman" who died during a military training exercise on one of the hottest days of the year.
Friends of Mr Roberts, a maths teacher originally from Penrhyn Bay near Llandudno in North Wales, took to social media to pay homage to a man described as a "caring, genuine guy".
James Hopkinson, a former instructor at the Infantry Battle School in Brecon, has described the challenging conditions that the two soldiers who died would have been up against.
He said that military exercises in the Brecon Beacons were designed to push soldiers "to the edge of their endurance," but that measures would "undoubtedly" have been put in place to mitigate the effects of the hot weather.
He added that while the exact circumstances of the deaths remain unclear, such endurance training is needed to make the British Army "the best in the world".
One of the Territorial Army soldiers who died on the Brecon Beacons on Saturday was a Maths teacher from Lewisham.
Lance Corporal Craig Roberts was taking part in a military training exercise, believed to be part of selection for the TA's section of the SAS.
The Luton terrorist group were trying to make an an improvised explosive device (IED) based on instructions in an al Qaida manual entitled "Make a bomb in the kitchen of your mom - by the al Qaida chef", the court was told.
Covert recordings of the pair heard Iqbal suggesting attaching the bomb to a remote controlled toy car and sending it under the gap of a gate to a Territorial Army (TA) centre in Luton.
The men were arrested following a series of raids at their homes in April last year after an intelligence-led joint operation by the Metropolitan Police Counter Terrorism Command and the British Security Service (BSS).