Just a few minutes to take your seats for our Webinar on Sex in the Census We will be tweeting at #WPUKCensus. .

Welcome. Event is chaired by @selina_todd who is introducing now #WPUKCensus

As an introduction @selina_todd explains how counting females shows how expectations change and how women and men experience life differently because of our sex. #WPUKCensus

Census shows how gendered roles are not down to biology but can change over time. It shows changes in employment market and education. Refuting notion that women accepted gendered roles #WPUKCensus

It's because women were counted in census that we are able to show how roles changed over time #WPUKCensus

Now talking about the boycott of the Census in 1911 by women fighting for Votes for Women. #WPUKCensus

Introducing @ProfAliceS now.

Now turning to @ProfAliceS, starting presentation by discussing 2021 Census sex guidance. Proposed guidance to accompany sex question advises respondents may answer sex question in terms of gender identity. Turning sex question into a question about gender identity. #WPUKCensus

No guidance prior to 2011. Guidance brought in without consultation. And likely to have more impact in 2021. #WPUKCensus

Rise in trans and non-binary identities in recent years will impact continuity of data #WPUKCensus

We are already losing data on sex. For example ACAS advise that data could be categorised by gender identity and data on non-binary people excluded #WPUKCensus

In Crime, police forces recording crimes by men as thought they were committed by women at the request of the perpetrator #WPUKCensus

In health, gender identity also replacing sex #WPUKCensus.

Sex matter in data collection because it's a fundamental explanatory variable #WPUKCensus. Giving an example about sex ratio at birth internationally. Some countries have higher rate of boys at birth.

Sex predicts almost every aspect of social life. If one looks at violent crime - vast majority of men are not violent criminals, but vast majority of violent crime is committed by men. Particularly marked for sexual violence #WPUKCensus

Women have historically been second class citizens when it comes to data. Many examples in @CCriadoPerez book Invisible Women #WPUKCensus

Sex, gender and gender identity are three distinct concepts which are increasingly being conflated in data collection. #WPUKCensus

Confusion about sex in data collection has been sown - idea that sex is a spectrum or that there are more than two sexes #WPUKCensus

That being non-binary means you don't have a sex. That people with DSDs are a third sex or that this is a gender identity. Sex is a social construct which is arbitrarily assigned. #WPUKCensus

Accurate data matters for all of us, and that includes trans people. For instance, why are so many more girls identifying as the opposite sex whereas in older generation this is less so? #WPUKCensus