Mrs Lockhart this week hosted Jennifer Melle and three of the Darlington nurses for a meeting with MPs on 24 March, where they shared their experiences of challenging workplace policies and defending sex-based rights.

The Upper Bann MP said the accounts highlighted the need for clarity, consistency and proper protection for women in the workplace, particularly in light of the Supreme Court’s ruling on biological sex.

Mrs Lockhart has criticised the Government for delaying guidance that would protect women’s spaces at work.

Mrs Lockhart said: “As we approach the first anniversary of the Supreme Court’s landmark ruling on biological sex, there is still no clear policy framework from government to reflect that judgment.

“One year later, there is still an invisible hierarchy of rights in many workplaces. The rights of biological men who identify as women are being prioritised over the rights of female staff.

“Workplaces need clear guidance to ensure that the safety of female colleagues is paramount.

“It was an honour to host, alongside Christian Concern, some of the most inspirational women, including Jennifer Melle and two of the Darlington nurses, who gave moving accounts of their lengthy legal battles to uphold sex-based rights in the workplace.

“These women’s livelihoods were put at risk because they stood up for biological reality.

“They have shown tremendous courage and conviction. But for every woman speaking out, there are many more who are not. Not because they don’t agree, but because they’ve seen women isolated, investigated and threatened with losing their careers.

“After a biological male was allowed to use their changing room, the Darlington nurses were told by their superiors to ‘broaden their mindset’. After she called a male sex offender ‘Mr’, Jennifer Melle was suspended from work. In both cases, legitimate concerns were ignored.

“Biology should not be disputed in any sector. This is especially true in healthcare, where biological reality underpins dignity and safeguarding.

“These nurses were vindicated in court, but should never have been forced to take legal action in the first place.

“I urge the Government to issue clear guidance for employers on single-sex spaces without delay.”