https://ico.org.uk/for-organisations/uk-gdpr-guidance-and-resources/lawful-basis/a-guide-to-lawful-basis/lawful-basis-for-processing/special-category-data/#:~:text=Special%20category%20data%20is%20personal,not%20have%20to%20be%20linked.
The UK GDPR singles out some types of personal data as likely to be more sensitive, and gives them extra protection:
personal data revealing racial or ethnic origin;
personal data revealing political opinions;
personal data revealing religious or philosophical beliefs;
personal data revealing trade union membership;
genetic data;
biometric data (where used for identification purposes);
data concerning health;
data concerning a person’s sex life; and
data concerning a person’s sexual orientation.
In this guidance we refer to this as ‘special category data’.
Where is the evidence that the protected characteristics of "gender reassignment" (because as you know ChristinaApple, "trans" is not a protected characteristic), has special, sorry "extra data protection rules"?
In my example I would give the name of opponents team, the game, the date, and the location where the game was held.
I would then expect that Sex Matters would collate this and report back to the relevant women's volleyball federation, something like "in 2024, we have had reports of # number of games where it is believed that a man played in a women's game. Please could you review your policies, based on evidence from studies relevant to your sport?"
And then I would expect the women's volleyball federation to ensure their policies are clear that the women's league is for women, so adult human females, and that males are not included. That is what I would like to see in the vast majority of sports.
Men are of course welcome to play in the men's volleyball teams.
Thanks ChristinaApple for making me check GDPR rules, I learned something new today. Maybe you will learn that "trans" is not a protected characteristic in the UK.