Thought I'd ask the opinion of the collective here, before getting a legal POV ...
helping some folk with job applications, and have just come across a company that basically insists on an answer to "Male/Female". There's no option for "Prefer not to say" (which all of the companies I've seen so far have set up). This was either Male or Female with a note that if you are transitioning you should put your destination sex.
Jumped out at me since it seems to be bucking the trend.