Of course this is finally happening under a Conservative Government.
Labour has ties to the people who might have objected: Catholics, Muslims, the black-majority churches.
The Conservatives' ties are to the church that at least midwifed the new sexual morality of the late twentieth century.
Having itself been at least midwifed by the new sexual morality of the early sixteenth century.
But this will not apply to "all schools in England".
Specifically, like everything else, it will not apply to the schools that are in practice preferred by England's present governing party.
But those do also inculcate a certain sexual ethic and sexual etiquette.
So of course this is finally happening under a Conservative Government.