Couldn't we have RRU/FRUs responding to the maternataxi and broken nail calls thus achieving the goal of reaching these calls within the time limit, and then telling the callers politely "You don't need an ambulance" At the same time this will free up real ambulances to go to real calls which do need transporting. The fakers get used to not having a real ambulance turn up, and if it is a real call an ambulance can soon be called by the FRU as backup.