This is the Bar Standards Board equality and diversity monitoring form. There is no question about sex.
So they will be unable to extract data on women or men as a sex based class.
Just as well the Bar is famously not deeply and fundamentally misogynistic and sexist in its structures and attitudes hey.
"2. Gender
(a) Which of the following describes how you think of yourself?
Male
Female
In another way
Prefer not to say
(b) Is your gender different from the one you were assigned at birth?
Yes
No
Prefer not to say"