SW, I think that 206 is involved with the same operation that I am (although I don't know that for sure). What I can say is that the one I raise money for has made the decision to have a qualified A+E doctor on board so that they can improve the service that they provide for their patients. It isn't a de facto requirement to have them just as it isn't a de facto requirement for a county to have an AA.
The bottom line is that AA's save lives that wouldn't be saved without them being available. People can talk about SAR & Coastguard cover but the nearest base to my county is about an hours flying time away which negates the whole point of the golden hour.
As I said in my first post on this thread, I'm only a volunteer, but in all the talks that I've done on behalf of my organisation, everyone is in favour of having one that is funded by charity.