"With all due respect" (which usually means the opposite of its seeming usage) back at you: LGBT people aren't going anywhere, and we're not going to stand for future generations of our global family to be subjected to the same binarism that we suffered during our own youths. So there's that.
It's enlightening to hear more about the U.K. educational system. If I'm understanding you correctly, approximately 80% of British schools currently are coed -- and I'd imagine most of the single-sex schools are privately-run? So would your proposal be to mandate that all public schools throughout the United Kingdom shift to single-sex classrooms during a specific portion of students' education? Or are you simply making the case for giving parents greater choice over their ability to send their children to a single-sex school if they so desire?