For a number of years we have had an unofficial "treat & refer" policy. But this was down to the individual on the RRV and how confident they were about calling for an ambulance back up or standing the crew down. It needs to be in writing as we all know if something happens to a patient who has been mis-diagnosed then its P45 time. So in my area, as in most others with RRV/RFU/FRV cars, different people will work in different ways. Personally I think that single response is a good thing but not at the expense of crews. And we need to really start charging on a sliding scale for the really mad as a banana calls!