There are several tiers I think. I live in the mountains, and we have several Army training camps close by. We also have Welsh Air Ambulance which is a charity, and Mountain Rescue, which is a charity run by an amazing group of local volunteers.
Mountain Rescue are called out a few times every week, for falls, broken ankles, people not prepared for the weather etc.
if somebody has a heart attack or a serious injury, Mountain Rescue contact Air Ambulance, who send their helicopter.
However, the army are also training in the mountains, and if one of the troops is injured they call on their own helicopter.
Mountain Rescue works really well and is embedded in the community, but I do think Air Ambulance should be government funded, or joined up with the army helicopter resource, because they are both regularly around here (I can see and hear them from my house), but they duplicate the costs by having two resources. Air Ambulance have to work incredibly hard at fundraising to keep the show on the road, and that seems unfair to me.
On another charity related note, I also think hospices should receive government support.