This leaflet explains the problems with Self- ID
Self ID isn't law at the moment. Is there anything to stop trans people doing this at the moment?
If a trans person is going to use this service, they are presented with 2 choices if they want to go on the sleeper service.
Neither seem suitable for a trans person under going transition and ticking the alternate option can make the other people in them feel uncomfortable.
If they are providing a service, they can't be seen to be discriminating if they provide a service for male and female passengers that puts their customers in potential danger - the idea of sharing a small cabin with complete stranger makes me feel very vulnerable. I can see why someone would also feel vulnerable sharing with a trans person.
I don't think that a 3rd space would be provided by ScotRail - and I don't know who would use it.
I think that them moving to individual spaces is much better.