Soldier deaths: 'If we soften up we get more casualties'
15 July 2013 Last updated at 09:17 BST
Investigations are continuing into the deaths of two soldiers on a training exercise in the Brecon Beacons, Powys.
They were serving with the Territorial Army, the BBC understands.
A third soldier is in a serious condition after Saturday's incident, which is thought to have been linked to the hot weather.
Colonel Richard Kemp, a retired commander who has trained on the Beacons throughout his career, told BBC Breakfast British soldiers have to train to be able to fight in hot weather.