Brown is no fan of St John but will defend them in this case.
The town concerned is half way along State Highway 1 between two major metro areas (Wellington and Palmerston North) with a small population, like a couple thousand small. They have one crew, Levin (about 20 minutes north) have two, including an Intensive Care Paramedic. Paraparaumu to the south (about 20 minutes) also has one crew as it is a small population centre.
All four were out at jobs, the Levin crews (probably three officers) were at a cardiac arrest and the Otaki crew were transporting somebody to hospital, which is an hour way one way. Brown does not where the Paraparaumu crew were transporting but it is up to an hour each way as well for them.
Any road response from Palmerston North is going to take nearly an hour even at increased speed, being a rural area they do not have Oscar/Tango available (Jeep based rapid response) and the only resources available are station-based crews, who again, were all busy.
Fire Service does provide emergency first response for the Ambulance Service when appropriate and they are trained in advanced first aid. In this case they were probably totally outside of their educational or experience level but knowing what the local volunteer Firefighters are like, they would have given 400%.
This is not a case of "somebody has exceeded their regulated driving hours and we did not call them" as has happened in the past but it sounds like nobody was actually free. Like any jurisdiction we have a finite amount of Ambulance resources and if they are busy, what do you do?
Being a small community it sounds like the Fire Service did call back the off duty crew who took about half an hour to locate, so they were obviously not in the town otherwise it would only take a few minutes. We do not respond off duty crews (i.e. who are off roster) because that is what we have on-duty crews for.
Brown agrees with St John (this is a rarity make some sort of note of the date and time) that in this case, the best resource (the only resource) was a HEMS Intensive Care Paramedic from Palmerston North. They are a seconded, road based crew so took a few minutes to get to the helicopter, although the helicopter and ambulance station are on the hospital grounds that is not to say they were not returning from a job and had to get into their HEMS jumpsuit.
So despite Brown not actually liking a lot of what St John does, Brown agrees that in this case the response was appropriate.