The conversion “therapies” that were applied to some gay men (up to about the late 70s) are already illegal, under laws which protect everyone in this country, and rightly so.
I’ve not seen evidence presented to date that suggests churches, or any other organised group in this country, are running programs to pressure trans identifying people into compliance. On the contrary, if you look to the States, there are indications that some deeply homophobic parents and church elders would rather see a transitioned (magically becoming “straight”) child in their congregation than a homosexual one.
Structured talking therapy is vital and can’t be put at risk of well meaning, but misguided and rushed, legislation. It’s madness that people should be able to access hormones that come with massive long term consequences to health and fertility, or be able to access surgeries with irreversible consequences, before they’ve been guided through the alternatives and before HCPs can satisfy themselves that the patient truly understands the risks.
We don’t push cancer patients through chemo or other toxic therapies without sitting them down and talking through the risks - and those are ACTUALLY life saving, or at least life prolonging, treatments. Puberty blockers, opposite sex hormones and/or top and bottom surgeries are very much not.