JK Rowling has come out in support of a researcher who was sacked after tweeting that transgender people cannot change their biological sex.
Maya Forstater lost her job in March after she posted tweets opposing government proposals to reform the Gender Recognition Act to allow people to identify as the opposite sex.
Ms Forstater, who worked as a tax expert at the Centre for Global Development, an international think tank that campaigns against poverty and inequality, took her case to an employment tribunal on the grounds that her dismissal constituted discrimination against her beliefs.
Employment judge James Tayler dismissed her claim on Wednesday, saying her views are “absolutist in her view of sex”.
Responding to the ruling, Harry Potter author Rowling wrote on Twitter: “Dress however you please. Call yourself whatever you like. Sleep with any consenting adult who’ll have you.
“Live your best life in peace and security. But force women out of their jobs for stating that sex is real?”
She added the hashtags #IStandWithMaya and #ThisIsNotADrill.
Following her tweet, Rowling’s name trended on Twitter as she prompted a divided reaction from fans.
Many people claimed Rowling is a “transphobe”, and the phrase “JK Rowling is a Terf” – referring to the term trans-exclusionary radical feminist – also trended on the platform.
A Terf is often used to describe feminists who express ideas that other feminists consider to be transphobic, including the belief that trans women are not women.
However, others welcomed the author’s comment, with many joining her in using the hashtag #IStandWithMaya.
Ms Forstater was accused of publishing “offensive” tweets questioning government proposals to allow people to self-identify their own gender.
Judge Tayler ruled against Ms Forstater in a 26-page judgment, in which he said her views did “not have the protected characteristic of philosophical belief”.
He concluded Ms Forstater was not entitled to ignore the legal rights of a transgender person and the “enormous pain that can be caused by misgendering a person”.
The dispute was seen as a test case on whether a “gender critical” view – a belief that there are only two biological sexes – is a protected “philosophical belief” under the 2010 Equality Act.
Ms Forstater had argued “framing the question of transgender inclusion as an argument that male people should be allowed into women’s spaces discounts women’s rights to privacy and is fundamentally illiberal (it is like forcing Jewish people to eat pork)”.
Representatives for Rowling have been contacted for comment.