1. Children are, in general, not permitted to make permanent changes to their bodies in the U.K. due to gender dysphoria; the treatments are limited to social transition and puberty blockers which can be reversed. Surgery is far more common for cis children wishing to have surgery for cosmetic reasons than trans young people who virtually all have to wait until they are 18 plus.
Puberty blockers are never reversed leading to long term reduced bone density, infertility and reduced sexual function.
2. There is decades of evidence as to the efficacy and safety of the treatment. The first "children" who received these treatments are now in their 40s and 50s. The success rates remain over 99%. Those stories aren't reported in the U.K. but have been subject to rigorous international studies, all of which are supportive.
There is research on a particular cohort of children, which is not the same as today’s cohort, and more recent evidence, just published a month ago, showing children gain no benefit in their psychological functioning.
3. The U.K. has been a backwards irrelevance to trans healthcare for decades, failing to follow best practice for patient care and demanding that trans people (of all ages) join unbelievably long waiting lists and traverse impossible hurdles.
The UK safeguarded children for years but has now succumbed to the same pressures from adult male activists who want children to be different to them, despite evidence showing they don’t end up happier and still have psychological dysfunction.
There is published evidence by the UK’s clinic that children are not helped. Your determination to put children through a process that will see them incontrovertibly harmed for no gain and argue for that despite the evidence in front of you is disturbing.