Unfortunately there are activist headteachers, and parents, who still see this as a social justice/ inclusion issue who will still want to support social transition and who will see this guidance as permission.
Local authority school support and advisors, who schools may involve are largely captured ideologically and believe in trans kids and 'inclusion' as their only guiding principle. Including children's social workers, educational psychologists and safeguarding leads.
The only way to stop these people and the ideology that has infected their professions, is clear unambiguous legislation: children cannot change sex, and schools should have no involvement in supporting the recent unsubstantiated beliefs some people have about gender identity.
There is no reason for schools to be involved in this dangerous nonsense that a minority of people believe.