Every single "ambulance" person in the country reading this, knew exactly what you meant Tom, we all say it every single weekend night shift (although "weekend" is becoming Thursday to Tuesday and its not just night shifts its days too) an extension to your thought would be a few extra boxes on the paper work, one tick from the crew and we know that the crew thought the patient did require an ambulance, another by the nurse re-enforces that and finally one from the doc shows us that yes indeed the patient wasn't wasting everyones time and money and did require an ambulance and a visit to A&E. no ticks and you pay for the ride and treatment.... obviously it needs a little tweeking, but the idea i feel might work in some form