Consent is key, so yes, I'd expect anyone to tell me anything about their history that a reasonable person would think important, including if they identified as trans.
Definitely agree with this.
I wonder if people think trans people should tell prospective partners about their trans status and if so at what point?
I would say extremely early in the relationship. Sometimes it doesn;t need to be said as such as its obvious but if 'passing' then it should be disclosed as early as possible. Unfortunately a lot of 'transgender' people seem to disagree, as I have a lot of friend (all lesbians) who9 have had issues with this. more in a one night stand kind of setting that relationship, but these passing transwomen are not disclosing they have a penis until they are alone with the lesbian. At which stage it can be extremely dangerous for the woman who is alone with a horny male to say 'no, I am a lesbian' (even though the transwomen knew these women were lesbians before that stage and tried to push their luck anyway)
So yeah, as early as possible, and immediately if sexual relations are on the table at all.
In the cases of my friends..well it definitely should have been said before they were alone together in an intimate setting.