This is an admirable service!!!
After I first registered for this service (nearly 3 years ago) and found out the benefits I informed various club committee and ordinary members of this, in the hope that the info would be broadcast.
The best introduction to this service that I have found was (and I think still is) on this link to a videoclip...
Hope none of our readers need to use it, ---but it's very comforting to know about all the extra capabilities of our phone and rescue services.
P.S. IT IS OPEN TO ALL