Bear with me. Thinking about Self-ID in preparation for filling in the consultation.
The Government seems to be looking about Self-ID as though it were the same as a name-change - you make a statutory declaration of your new name, start using it, and off you go.
Maybe it isn't like that.
Maybe it should be more like a marriage contract. A marriage is a public contract between two people, as a result of which they get certain social benefits which used to include tax breaks, inheritance rights, etc.
Changing from a man to a woman, or vice-versa, isn't just a personal decision. It's a social one too, it affects your family, your children, if you have any, your employers. It means you can conceal debts or past crimes.
So maybe Self-ID should be more like getting married, in that you would publish 'banns' and anyone who objected would have the right to be heard.
But the TRAs would never accept any exernal constraint, would they.