*Try replacing the change of gender with some other condition say autism would you demand that the parents and school reveal the condition to all the other members of the school?
If not why should this be revealed.*
Because sex is not a condition. It is part of who we are. I wouldn't 'demand' that autism be revealed - I don't think I have ever demanded anything, really - but where I have come across children with various 'conditions' it has been very much in their interests for them to be revealed, and parents have fought tooth and nail to get them recognised. If the child has a mental health issue then of course he should get help. I am aware of the parlous state of MH provision, but that doesn't mean that a school should go against the NHS recommendations and decide to deceive other children and their parents. I'm surprised that the governors went along with this - were they deceived, too.
*The school has a duty of confidentiality for all children.
I don't think it is a question of prioritising best interests but of seeking a balance which ensures all are treated fairly.*
This was not balanced though. The 'demands' of one family were put against the interests of the other children. Schools don't have a duty of confidentiality across the board. Teachers will call in social services, the police and other bodies where necessary. I wouldn't expect a teacher to expose the details of a request for a child to be 'treated as' a different sex, but that doesn't mean that they have to accede to that request, or that they have to deceive other people.
As for the evidence of their eyes. How many children actually see evidence of the sex of anyone in a school setting?
When the child starts to wave a penis about?
Willy-waving notwithstanding, I could just as easily ask how often a child is 'treated as' a girl or a boy in a primary school. Uniform aside (which can easily be adapted) in what way are boys and girls treated differently at school these days other than to use separate toilet facilities? As I said in a previous post, why not explain to the child that he may want to be a girl, but whilst he is not one, it really doesn't matter, as he will do the same things that girls do, and try to find out what specifically is troubling him.