If the brigades were acting under the direction of the council officer then they have done the right thing. They have reported it to the Fire Service so obviously its under their direction that they want it extinguished.
But, as I mentioned before, if the fire service is acting under the direction of the Council Inspector, then they are using the Council Inspectors powers, which is OK. However, if the Council Inspector just did a drive by, did not tell the occupants of the house that the COUNCIL INSPECTOR required them to extinguish the fire, and just sent the fire service, I think the occupants of the house were within their rights to tell the fire service to get off / keep off the property (although abusing them for it is a bit rough)
The CFS has the power to extinguish a fire on private property at any time of the year (not just fire danger season) if in the opinion of the CFS, that fire is either out of control, or is likely to get out of control, then we can put it out, whether the occupant likes it or not.
A small rubbish fire, may not fall into that category......
Pip