The Ministry of Defence is to be censured over the deaths of three soldiers on an SAS training exercise in the Brecon Beacons in 2013.
The Health and Safety Executive said it will issue a so-called Crown Censure following the tragedy on one of the hottest days of 2013.
But for Crown immunity, the MoD would have faced prosecution for failings identified, said the HSE.
Lance Corporal Craig Roberts died during the march and Lance Corporal Edward Maher and Corporal James Dunsby collapsed and died later.
SAS selection tests are to be changed to protect recruits from dangers such as extreme temperatures, it has been reported.
Families of the Army reservists who died after an SAS march "are never going to get the full picture", an ex-soldier has told ITV News.
The family of army reservist Edward Maher have said that it is unacceptable that their son paid for his training 'with his life.'