I think you would be lucky to get put forward for it by September, on appointment 2, but chances are you will get put forward in December on appointment 3 as that is standard practice. Then you will have to do blood works and have an appointment for the endo, that's another 3 or so months wait. It will probably be early to mid 2017 I would guess. If you are very lucky it may be the tail end of next year. Of course if you don't have your name change and social transition done already, with evidence like deed polls and pay slips, you an add time to that. I don't mean to be negative, but it's best to be realistic.