These are all good reasons for acting as I suggested above.
Chatting about this the other day brought up the suggestion, for airborne emergencies, of contacting 121.5 with a similar, clear, instruction that a particular service is required. One presumes that the D&D people have telephone links to regional ambulance controllers, but there is doubt over their being aware of regional boundaries.....
I suppose it is worth re-emphasising that frustrating difficulties may occur in communication, which is the cause of my posts above, and/or in deployment of the ambulance and its arrival.
Obviously, we feel frustrated at the fact that a 'patient' is waiting for treatment; we are also aware of the knock-on effects on the schedule.
If ambulance authorities are prioritising calls and our sick passenger or crew member s waiting because of lack of capacity in the ambulance service, this is really a political issue to do with taxation, budgets, and funding.
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'Brighten my Northern Sky' Nick Drake R.I.P.