I wouldn't have called an ambulance, I would have cooled down and hydrated the child. If I had failed in doing so and for some unknown reason the temperature had carried on rising and the parent had refused to give me permission to use an antipyretic I would have driven the child myself to A+E especially if there was a history of febrile convulsion. My point was more that sometimes you have to rely on your own jugement when the parent of a child is lacking in a way or another rather and you can't hide behind "they wouldn't let me" than "oh you should have called and ambulance". Thus ends today's lecture :-)