Peggie, who was suspended by NHS Fife in January 2024, previously took the health board to an employment tribunal in Dundee. In December 2023 the tribunal upheld her claim that she had been harassed by the board but dismissed her allegations of direct, indirect discrimination and victimisation.

Her new case asserts that the RCN did not inform her in January 2024 that she could pursue a legal claim against her employer, refused her request for legal assistance in January 2025 during the board’s disciplinary investigation, and failed to advocate for her demand that changing facilities be designated single‑sex.

Peggie is seeking a tribunal finding that the union discriminated against her because of her gender‑critical and “sex‑realist” beliefs, and that the RCN’s conduct breached her rights as a union member.

The dispute has become a flashpoint in the broader gender‑rights debate, drawing public support from gender‑critical advocacy groups and author J.K. Rowling, who have voiced solidarity with Peggie.

Legal experts note that a ruling against the RCN could set a precedent for how professional unions must handle members whose views on gender issues are contested, potentially reshaping union‑member relations in future ideological conflicts.