In reply to The Lemming:
From a Hill walkers point of view:
I had a serious incident on a walk I was leading in the Western Beacons last year where the first aid was essential, being trained in first aid made all the difference.
It would have been really difficult had I been there as a leader with no first aid knowledge or kit to hand. There are lots of walk leaders in that situation, its a time bomb waiting to go off for the individual leading the walk and the casualty.
The incident required professional treatment but the basic skills were enough to get though it until I could get him to a Hospital.
Basic, being knowledge of Shock, CPR, Hyperthermia/Hypothermia, broken bones, Burns, using the first aid kit, and also when you divide the line between walking someone off the hill and making the call for MRT.
Its only being exposed to situations that you really learn, the other important thing is if you have to get off the hill in poor conditions. It's quite a challenge with a group, an injured person and having to re-route your walk while keeping focused on lots of different things all going on at the same time.
Jason