A third soldier has died following an SAS training exercise in the Brecon Beacons, the Ministry of Defence said on Tuesday.

The news comes as detectives at Dyfed Powys police are still investigating the deaths of two reservist soldiers who collapsed and died during the selection process on 13 July, when temperatures reached up to 29.5C.

There are detailed guidelines relating to the health and safety of personnel training in extreme weather conditions

David Robinson, specialist military claims coordinator at Thompsons said: “The MoD’s duty of care extends beyond the battlefield and there are detailed guidelines relating to the health and safety of personnel training in extreme weather conditions.

“There are lots of serious questions that now need answering about where responsibility lies and urgent action needs to take place to ensure that necessary resources are in place to support members of the Armed Forces.

“My thoughts are with the families of the three soldiers who lost their lives.”