News flash: Orthodox schools do not teach the reproduction part in the secular curriculum. They wouldn’t be caught DEAD teaching about gay values, since it is in direct conflict with Torah values. They get a general idea from their parents about what is what, and a detailed sex ed course when they become engaged (they marry very young, usually with the girls about 18 or 19 and the boys a couple years older).
I don’t know how England is leaning on them. In the USA yet, it wouldn’t dare happen.