Maya helpfully reminded me that Freddie lost Freddie's appeal because:
the Court of Appeal upheld the term "mother" is inclusive of all who grow another human being inside their body even if they identify as men (or non binary)
Judgment quotes:
The status of being a "mother" arises from the role that a person has undertaken in the biological process of conception, pregnancy and birth.
Being a "mother" or "father" with respect to the conception, pregnancy and birth of a child is not necessarily gender-specific, although until recent decades it was invariably so. It is not possible, and recognised by the law, for a "mother" to have an acquired gender of male, and for a "father" to have an acquired gender of female.
So the Court of Appeal came down on the sensible side of sex versus gender. Yes Freddie's "gender" is "male", but that does not change the reality of Freddie being a mother.
As, thanks to recent gender reforms, the gender people have got what they asked for - "mother" is not gender-specific. (But it does remain sex-specific, due to reality, of course).