Another walker who saw some of the soldiers training in the Brecon Beacons on Saturday has said he saw nothing out of the ordinary. Phil Speck told BBC News:
They did look very hot, they were tired in the afternoon, but it did kind of seem like you would normally see the soldiers when you're walking up there.
I think maybe if we had walked past another walker who was on their own, you might have gone 'Is everything OK? Do you need some extra water?'
They looked very hot and sweaty but when you see the soldiers you do walking in the Brecon Beacons, you see them all the time, you kind of get used to the fact they can cope with those conditions.
Emotional tributes have been paid to a third army reserve soldier who died from injuries sustained during SAS selection training.
One of two Army reservists killed in a military exercise in the Brecon Beacons on Saturday has been named as Lance Corporal Craig Roberts.