Peter
As far a I know, the helicopter use would have cost the NW ambulance service nothing (other than the fact that they may be paying the salaries of the paramedics), as the charity funds it all. I expect that when air ambos are predicated on getting the casualty to the hospital within the 'golden hour' or getting well trained paramedics or doctors to the casualty as quickly as possible, then a number of false calls will have to be factored in (you don't know its a false call until the first person qualified to make that judgement arrives on scene). As for the rest of the vehicles, well other than the fuel costs, they have to be somewhere. Might as well be there