www.thetimes.co.uk/edition/news/the-female-nhs-nurse-i-asked-for-came-with-stubble-83rq9p0gg
Summary: A woman requested a female nurse to carry out her cervical smear test. When she arrived the nurse was clearly male (stubble, deep voice etc). When she questioned this, the nurse insisted that they were a woman because they were trans. The patient says she was made to feel like a bigot and in the end decided not to go ahead with the smear test.
Now in this case, the NHS Trust has apologised and said that the nurse did not handle the situation appropriately. However the government are planning to introduce into law the recommendations of the Women and Equalities Committee which include, not only allowing men to 'self-identify' as women without any medical diagnosis of gender dysphoria, but also to get rid of the exemptions currently in place.
Currently, while biological males can legally 'become' women (following a diagnosis of gender dysphoria - there is already no requirement to have any hormone treatment or surgery), there are some limited exemptions in law:
“If a service provider provides single or separate sex services for women and men, or provides services differently to women and men, they should treat transsexual people according to the gender role in which they present. However, the Act does permit the service provider to provide a different service or exclude a person from the service, who is proposing to undergo, is undergoing or who has undergone, gender reassignment. This will only be lawful where the exclusion is a proportionate means of achieving a legitimate aim.” For example, it is currently legal for a group counselling session for female rape victims to exclude biological males if female clients would be not feel able to attend and participate in the group if they were present.
If this new legislation is passed and there are no exemptions allowing for transwomen (biological males) to be treated differently from biological women, there will be no way to protect vulnerable women who don't feel able to access rape services or medical services if they can't be sure of a female-only service.
This won't be like other rights conflicts (e.g. on sexual orientation versus religion) where test cases go to court and judgements are made because women won't exist as a separate protected group from transwomen.