Maya Forstater was a visiting fellow at the Centre for Global Development. Her contract was not renewed after she aired her views on Twitter

A tax avoidance researcher who claims that she lost a job at a think tank for tweeting her views on trans people told an employment tribunal yesterday that “there is one sex or the other”.

Maya Forstater, 46, spoke at the Central London Employment Tribunal in proceedings against the Centre for Global Development, which campaigns against poverty and inequality.

Ms Forstater was a visiting fellow at the organisation, which is based in Washington and London. Her contract was not renewed in March after she aired her views on Twitter.

In a statement provided to the tribunal, Ms Forstater wrote: “From the earliest I can remember, I have understood that there is one sex or the other.”

She was earlier accused of fear-mongering for tweeting