For MPs
Here are all the Sex Matters briefings for MPs. You may also want to look at our updates, publications and external resources on the legal system.
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Good Law Project’s failed legal challenge against the Equality and Human Rights Commission
Court: High Court, King's Bench Division (Administrative Court) Judge: Mr Justice Swift Date: 13th February 2026
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EHRC draft code of practice for services, public functions and associations – briefing for Parliamentarians
Large-print version of this briefing.
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Crime and Policing Bill: combatting exposure and the importance of single-sex spaces – briefing for peers
Large-print version of this briefing.
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Ben Cooper KC’s analysis of FWS Supreme Court judgment – briefing for Parliamentarians
Five key points in a summary of the analysis by the lawyer who represented Sex Matters in our intervention...
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Unlawful policies for police searches – briefing for Parliamentarians
An overview, action so far, and next steps needed.
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Sex and digital identities – briefing for Parliamentarians
The Data (Use and Access) Act 2025 got royal assent on 19th June. Concerns had been raised that digital...
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EHRC code of practice re sport – briefing for Parliamentarians
The vast majority of people of all ages and political persuasions agree that the women’s category in any sex-affected...
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Data Bill – briefing for House of Lords debate on 12th May 2025
Following the recent Supreme Court judgment which has confirmed the importance of biological sex as a characteristic in life...
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Data Bill: amendment NC21 – briefing for Parliamentarians
Report stage – House of Commons 7th May 2025
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For Women Scotland v The Scottish Ministers UK Supreme Court judgment – Parliamentary briefing
This briefing sets out some actions the government should take. It will help MPs and peers to ask the...
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Gender-recognition certificates (GRCs): the facts
As background information for the Supreme Court judgment on For Women Scotland v The Scottish Ministers on 16th April...
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The Sullivan Review and the Data Bill – Parliamentary briefing
The Review of data, statistics and research on sex and gender was published by the Department for Science, Innovation...
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Data (Use and Access) Bill: going to the Commons – Parliamentary briefing
The government’s Data (Use and Access) Bill will soon be moving to the House of Commons, with the second...
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Data (Use and Access) Bill: Lords report stage – Parliamentary briefing
The government’s Data (Use and Access) Bill was introduced in the House of Lords on 23rd October 2024. Report...
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Can the Civil Service return to impartiality? – a briefing for MPs
In December 2024 the DCMS and DSIT paid £116,749 to settle the employment-tribunal claim of whistleblowing civil servant Eleanor...
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Single-sex provision for NHS staff and patients – briefing for Peers on Lords oral question
This covers the oral question from Baroness Fox on Wednesday 8th January 2025 at 11.30am in the chamber.
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The For Women Scotland case at the Supreme Court
A one-page summary of what the case is about, why it matters, and what the possible outcomes are.
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Sex and the Data Bill – summary report
The government’s new trust framework for digital verification services has a critical flaw: government data itself is not trustworthy...
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British Transport Police transgender search policy – briefing for MPs
A one-page summary of the reasoning behind Sex Matters’ pre-action letter to the British Transport Police challenging its new Transgender Search...
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Sex and the Data Bill – briefing for Parliamentarians
The second reading of the Data (Use and Access) Bill in the House of Lords is on Tuesday 19th...
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Briefing on our intervention to the Supreme Court on the definition of sex
This six-page briefing looks at our key arguments why “sex” in the Equality Act 2010 should be construed as...
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Amending the Equality Act 2010 to protect women’s rights – technical briefing for MPs
A one-page overview followed by detailed analysis of the underlying legal issues and a simple legislative solution.
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Stand up for single-sex services – why it’s time to make the Equality Act clear
Women and girls depend on female-only services, spaces, sports and associations for privacy, dignity, fairness and safety. The Equality...
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The problem of male inclusion in women’s sport
A three-page briefing explaining what's going on in Olympic boxing and the background information you need.
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Briefing on sport and DSDs (disorders of sex development)
A one-page briefing on male sporting advantage and why DSDs matter in sport.
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Puberty blockers FAQs – briefing for Parliamentarians
A two-page summary of the most frequently asked questions about puberty-suppressing drugs.
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Puberty blockers – a briefing for MPs
We explain the background to the Secretary of State for Health and Social Care's decision to end the use...
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Briefing on new poll on sex and gender
The law on sex and gender: what policies do the public want? Results of Sex Matters poll.
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Applying for a gender-recognition certificate: the facts
Is the process “intrusive, outdated and humiliating”? This briefing examines the evidence.
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Make the Equality Act clear – PPC briefing
Briefing for prospective parliamentary candidates, 3rd June 2024, after the Conservative party announced it would include this in its...
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Gender-distressed youth and suicide risk – factsheet
The possibility of suicide can be a concern for parents with a child experiencing distress about their sex, and...
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Who can play women’s football in England? – briefing for Parliamentarians
Includes details of current FA and FIFA policies on the inclusion of trans-identifying males.