I can only give you my (now outdated) information @DeaconBoo.
My son disclosed to me in 2016 that he thought he was trans (the word he actually used was transvestite). Our first port of call was CAHMS, who referred him to Talking Change, who then advised him to go to the GP for a referral to GIDS.
My son had his first appointment at the Tavistock at the beginning of 2019 (which surprised me when I just went back through my calendar to check, I thought he’d had longer with them than a year).
At the appointments he had 2 therapists and the appointments lasted for one hour every 6 weeks or so. Again I have just checked my calendar and he had 7 in all. For the first 5 he had the same 2 therapists, a man and a woman. The male therapist was himself gay, and asked my son (who thought he was gay at the time) to do things like attend a Pride March or just go to Camden and immerse himself in a bit of gay culture. In short he was trying to get my son to accept being gay and not be ashamed of it. I remember how happy the therapist seemed for my son when he (my son) went to an appointment and told him he’d got a boyfriend! The therapist was honestly a godsend and I would shout his name from the rooftops if I didn’t think he would be targeted by TRA’s.
For the last 2 appointments we had the same male therapist but the female therapist had gone on maternity leave so we got a different female therapist and she scared the shit out of me. She was extremely all-in on gender ideology and I thank my lucky stars that my son only saw her twice. I am also glad that the male therapist was there for all my son’s appointments, as he left very shortly after my son was discharged.
At his last appointment my son was told that he would now be referred to the adult GIDS as he had reached the age of 18. We were told that he would be pretty much started straight away on cross sex hormones and be referred for things like feminine vocalisation training. He was also told that he would skip to the front of the queue as he had been referred from the adolescent service rather than going in as a new patient as an adult.
Then lockdown happened and everything stopped. My son got out into the real world and by maybe October/November of that year realised he was not trans. And recently he’s decided he’s bisexual, not gay after all. In short he is living his life and learning things about himself, as all young people should be allowed to do without risking life changing treatments.
Sorry, that was a bit of an essay, but I hope it helped. I’m not the best at writing long bits of information!