It's all so very simple yet people make it all so complicated. If you are a male, then you can't use female spaces. If you are a female, then you can't use male spaces. It's not possible to change chromosomes, therefore, it is not possible to change sex. We separate spaces where people are most vulnerable based on sex alone and that should be respected.
Trans-people, for example a male who identifies as a lady should be free to identify as they choose and wear whatever they choose (as long as not indecently exposing themselves) and the same goes for a female who feels as though they are a man. The constant sniping and mocking about issues that don't relate to safety don't do the cause of women's safety and good.
The mind and mental state of being are two different things, that's why we have mental health and physical health. It doesn't matter how many operations a male has, they won't ever be a female. And it doesn't matter if a female has their breasts removed and a prosthetic penis attached, they will still be a female.
That said, the trans group of people should be able to live freely and without ridicule or harassment. My post is not intended to incite hatred or harassment against the trans sector of people.
Small venues should allow trans-identified persons to use the singular, universal cubicles and larger venues with more space available should have a designated cubicle for people who are gender-non-conforming.
Some of the debate needs to be had but a lot of people have jumped on the bandwagon for their own personal gain.