The point, surely, is that the children and their parents were deceived and at least one teacher was forced to collude in this deception. Where are her rights?
There has been no response to the point I made earlier that being approached with a request does not compel the HT to comply with it. Confidentiality in a case like this is fair enough, insofar as there is no obvious need for the HT to make the request public, but there was no need for the deception. A simple 'sorry, but that's not possible' would have sufficed.
Confidential registers? When did they come in, and why? I can understand codes for disabilities, allergies or other information that only a teacher might need to know, but when did sex become confidential? Are you saying that keeping the sex of children private is a legal requirement, Glorianny?
There are some things that should of course be confidential. Medical conditions, issues to do with a child's domestic arrangements, anything that might prove difficult for the child if other children knew - a father who's in jail for murder, that sort of thing. But those things don't impact on the other children in the way that letting them think that a boy is a girl might. Mostly, on a day to day basis, it won't matter at all. But when a child has a sleepover, for instance, shouldn't the parents be able to decide if they invite members of the opposite sex? You or I might not differentiate, and that is our right, but why should other people be denied the right to make their own decisions?
At what point was this deception planned to end? Is it still ok to have a boy in a girls' dorm on a school trip when they are 14? Playing sport with the girls after puberty? Where are the rights of the girls here? Has informed consent become a thing of the past?