Biology Matters Project Compendium 5th Edition

June 7, 2025

Policy Exchange today demonstrates that dozens of organisations – in the public, private and charitable sector – are continuing to question the Supreme Court’s ruling on the definition of a woman.

In the latest edition of its Biology Matters compendium, published today, Policy Exchange factually documents there have been just under 70 developments in the highly contested area of trans and gender policy over the last year. More than half of these have taken place since the Supreme Court’s including universities, Whitehall, unions and sporting organisations.

In a Foreword to the report, Rosie Duffield MP writes:

“Policy Exchange’s authoritative Biology Matters compendium catalogues, amongst other things, the many organisations – in the public, private and charitable sector – who appear determined to obfuscate, equivocate or in some cases outright defy the Supreme Court’s judgement. How many more will simply stay silent and allow local activists to continue to run the show?

“Government Ministers must lead from the top to ensure public bodies comply with the law: ultimately, this is their responsibility, not one where they can simply leave it to the Supreme Court or the Equality and Human Rights Commission. Employers need to think more carefully about who they have been listening to, what their motives are – and how much listening such advice is likely to cost them. High paid public sector leaders and corporate CEOs need to take responsibility for ensuring their organisations comply with the law, rather than effectively outsourcing such decisions to activist staff networks and external lobby groups such as Stonewall.

“Radical positions on gender identity have become deeply and it will be the work of years to rectify it. There should be no illusions that this is over: there will be many more battles to fight before women’s sex-based rights are secure.”

The launch of the Compendium was covered by: