It can't be emphasised how important this is. For too long extreme transactivism / queer theory has been allowed to rampage through schools, insisting on the dismantling of safeguarding and that children MUST be taught that they have no right to boundaries from the opposite sex - especially girls and especially when undressing.
Many parents have looked to challenge schools in the courts but have backed away because they fear a backlash from a school against their child.
Having said that, it was a courageous teenage girl and her mother who threatened the trans captured Crown Prosecution Service with a judicial review after their massive overreach in writing dangerous "guidelines" for schools. Senior CPS staff promptly realised that the embedded coercive control, the targeting of children to remove boundaries, especially in changing rooms and toilets, would result in public humiliation and the "guidelines" were withdrawn and scrubbed from the internet.
All parents should be thankful to the OP and daughter for their courage and persistence. This is long overdue 