This looks promising. These bits in particular:
"Sources said the new advice, which is for all schools, will help clarify what teachers are required to do under equality laws. They cited school uniform, lavatories and sports teams as areas that are intended to be covered.
One said this was not an attempt to engage in a “culture war” but to produce clear advice and end confusion about the Equality Act and the Gender Recognition Act. The EHRC issued guidance for schools in 2014, but has asked the DfE to publish its own version.
The department issued guidance in 2020 on gender awareness and the curriculum, which said teachers should not tell children that they might be a different gender, based on their personality or the clothes they want to wear. However, the new guidance is expected to be more comprehensive and cover how teachers should address practical issues."