It's a very difficult situation if you are overruled by management in a school.  Various friends and family members teach and all sorts of things go on such as trying to get teachers to work as playground supervisors and administer first aid without training, or only having one first aider on extended leave.  Head teachers don't seem to realise the school has medical responsibility for the child as well as being in loco parentis and the first aider is the most senior person as far as that goes.

If it was me, I would have called an ambulance and then told the head teacher to notify the parents that this was the case.  It can easily be explained as covering the schools back.  Back covering by handing the child back to the parents may not work as if they complain about the school not providing adequate care, the education authority will be looking for someone to blame and that might be the first aider.

I'd suggest they submit a formal complaint that their recommendation was ignored in writing to the education authority explaining that this had a negative effect on the childs outcome.  It's far more likely they start getting in management consultants then rather than looking at the first aid itself

I have been in the situation (not in a school setting) where somebody has attempted to overule what I wanted to do with a patient. I would not ever get into an arguement over the patient, however one "trick" if you like I have found useful is to say in front of a witness (there's usually loads of rubber necks about) "That is fine if you feel you need to do something other than that which as a qualified First Aider I am advising that is yout choice; however YOU accept medico-legal responsibility for this patient and the consequences of your actions." That normally gets their attention and gets them to consider the sense or lack thereof of their actions.

By the way when, as is sometimes inevitable, someone mentions "but what if we get sued" I always say" if you were a parent would you be more likely to sue a school who did nothing or one which provided some care" I know what my answer would be. 

Is that on the same place on his head or the same place in the play ground?

so just basically clumsy then? or do the kids have some sort of playground 'JackAss' thing going on?

don't ya just love em

so obviously all appointed first aiders that work in a nursery school have near enough the same training,so can i just ask anyone,if a 4yr old child had hit his head on a rock but wasn't knocked unconsious but had a large gash on his forehead and looked concussed and had also gone quiet,should the appointed first aider of phoned for a ambulance or taken the child to a&e???

and I've replied to the other other post on this.