RootyT00t - I am glad you have moved on from accusing people (including me) of being "transphobic" for stating the indisputable fact that it is impossible for anyone to change their biological sex 
Has anyone already recommended this as a good "Beginners Start Here" guide to understanding some of the completely different populations bunched together under the label "trans"?
"Gender dysphoria is not one thing"
by J. Michael Bailey, Ph.D and Ray Blanchard, Ph.D
Dec 2017
"One problem with the current mainstream narrative regarding gender dysphoria is that it makes no distinctions among apparently very different kinds of persons. For example, Bruce Jenner appeared to be a very masculine man, an Olympic athlete who was married to three different women and had six children with them, before becoming Caitlyn Jenner. In contrast, Jazz Jennings, a natal male, was so feminine that she earned a diagnosis of gender identity disorder at the age of four. She is attracted to males. Jenner and Jennings are so different in their presentation and history that it is surprising to us that anyone thinks they have the same condition. Jenner and Jennings are examples of two very different kinds of gender dysphoria that have been scientifically well studied, and have fundamentally different motivations, clinical presentations, and likely causes.
The failure of so many therapists and activists to acknowledge this distinction is disturbing for at least two reasons. First, it suggests they are either ignorant of relevant scientific evidence or are purposefully ignoring it. Second, failure to make scientifically valid and fundamental distinctions among different kinds of gender dysphoric persons can only prevent progress toward finding the best approach to helping each. Measles, influenza, and strep throat are all associated with fever. But if we had merely lumped them together as “fever,” we would not have effective treatments for them."
Continued at:
4thwavenow.com/2017/12/07/gender-dysphoria-is-not-one-thing/
The expansion of "transgender" seems to be a reverse of the situation with Diabetes, where a better understanding has resulted in identification of different clusters of disease processes that are, to date, still referred to by the umbrella term "Diabetes". With "transgender", the opposite situation has been politically engineered, with different conditions artificially grouped under one heading. There is no medical basis for grouping all these entirely different "human conditions" under the label "trans".
(Diabetes reference for anyone interested:
www.nhs.uk/news/diabetes/are-there-actually-5-types-diabetes/ )
The sensitivity around any reference to "mental health" in relation to "trans" is misplaced. It is damaging to people seeking relief from Gender Dysphoria and damaging to people needing psychological support during a gruelling process of medical and surgical "reassignment" procedures. It is also dangerous: thinking that one is the opposite sex can be due to psychosis.
As one Ffionne Orlander (trans person) explained on Twitter when someone tried to say that gender dysphoria was not in the mind (screenshot):
"Everyone knows that dysphoria resides in the big toe . . . or was it the liver?"
Also consider the strikingly different populations sheltering under the "Transgender Umbrella" from the nasty "cis rain" (see screenshot).
According to Stonewall, aiming for "acceptance without exception" for "including (but not limited to)" people who may describe themselves as:
- transgender
- transsexual
- gender-queer (GQ)
- gender-fluid
- non-binary
- gender-variant
- crossdresser
- genderless
- agender
- nongender
- third gender
- two-spirit
- bi-gender
- trans man
- trans woman
- trans masculine
- trans feminine
- neutrois.(a non-binary gender identity that falls under the genderqueer or transgender umbrellas).
www.stonewall.org.uk/sites/default/files/stw-vision-for-change-2017.pdf
FermatsTheorem Mon 08-Apr-19 17:33:39
"I'd just like to invite everyone to watch the video clip in the opening post. Note in particular, the section from 4.30 on, where Tara talks about the trans umbrella, and the section from 5.30 on, where Tara explicitly explains that the trans umbrella encompasses fetishistic cross dressers, who cross-dress for sexual motivations."
"There it is, straight from the mouth of someone trans themselves, who is delivering a lecture to healthcare professionals on how to deal with trans people in health care settings."
"I think it's important to remember this when people discuss what were formerly single-sex environments, like open plan changing rooms, and hospital wards, and youth hostel dormitories, and women's homeless and domestic violence shelters - which the trans juggernaut wants to repurpose as single-gender. The trans umbrella, according to one leading and highly feted proponent of it, a proponent taking a leading role in training and drawing up guidelines, explicitly includes male bodied cross dressers who cross dress because of sexual fetishes."
www.mumsnet.com/Talk/womens_rights/3385533-Prominant-campaigning-role-of-Tara-Hewitt-NHS-TELI-Social-work-universities-etc?msgid=86201820
This is the video referred to by FermatsTheorem, starting at 4:26 (shortly after Tara claims that there are 600,000 trans people in the UK):
The Gender Recognition Act 2004 was passed to benefit the tiny number of "homosexual transsexuals" (HSTS) who are about 1% (ONE PERCENT) of the total, estimated "queer" population sheltering under the "Trans Umbrella". (Or less than 1%, if we are to believe Tara.)
With reference to your earlier comment about the requirements around "living as the opposite sex". As far as obtaining a Gender Recognition Certificate is concerned, this is for two years, not one.
However, the requirements are based entirely on documentation, eg. change of name on a utilities bill. There is NO requirement to have used spaces or services designated for the opposite sex, neither is there any requirement to modify one's body or physical appearance in any way.
Proof you’ve lived in your acquired gender
This proof must cover the required time that you’ve lived in your acquired gender.
It could include copies of your:
- passport
- driving licence
- payslips or benefit documents
- utility bills or other documents of an official nature
All documents should be in your acquired name and gender. The earliest document must be dated before the beginning of the required time."
www.gov.uk/government/publications/gender-recognition-certificates-t455
The whole process is based on a Panel considering whether the documentation meets the requirements of the legislation. If anyone says it was degrading to "go before" a Panel, etc. - they are lying!
"LONG, SLOW, DEMEANING, INTRUSIVE AND DISTRESSING
or SWIFT, PROFESSIONAL AND RESPECTFUL?"
Maya Forstater, March 11 2020
archive.ph/ct4yp
Also by Maya and highly relevant to the OP Question:
"Single sex spaces are a question ofconsent"
a-question-of-consent.net
(Next post "What about Transmen?" - I have exceeded the character limit for a Mumsnet post.)