Glad to hear she is better.
We had a minor problem with a guest who, due to a chronic condition, was unable to overnight on Salhouse. We got the Nav lights out and went back to the mooring where the problem could be managed.
I think the emergency services have a good grip on reaching casualties on the Broads, during the TMOR I saw a paramedic car and an ambulance at the river, goodness knows how they got there. Of course the Air Ambulance and Coastguards fly in when needed too, so the main issue is alerting them in the first place. Mobiles when we can, but that is really uncertain as you say, VHF to coastguard?