THREAD: Today ONS has published a report on how it decided that the Census question "what is your sex" should *not* mean the sex you were born

The ONS considered 5 difference concepts of sex:
Sex registered at birth,
Sex recorded on birth certificate,
Sex recorded on legal/official documents,
living / presenting sex,
Self-identified sex.

/2

A big part of their evidence for why asking 'sex registered at birth' was unacceptable was that trans people won't like it and might boycott the Census. /3

From this they concluded "The highest negative impact on accuracy & reliability is anticipated if sex registered at birth was collected due to the likely negative impact on response rates caused by the perceived invasion of privacy" /4

and that "The data need [for birth sex] is not considered to be strong enough to justify collecting this" /5