I'm curious - why? Can you send some resources about that? Do you know if there is an alternative law I could support my claims with in UK or EU?

Internal conversations about you does not qualify as personal data. The data was not collected from you and you did not have to consent to have them talking about you.

There’s an argument to be made that it is personal data:

“Art. 4 (1). Personal data are any information which are related to an identified or identifiable natural person.”

I think one of the reasons GDPR is so powerful is its broad definitions that favor people and data about them.

[1] https://gdpr-info.eu/issues/personal-data/#:~:text=GDPR%20Pe....

It's a weak, absurd argument. The key part is about data that is collected from the person by the data processor.

To repeat: a conversation of two people with their opinion of sircastor is not information about you. It's not like people could only emit their opinion if you consented to it, and you are not the one taking this report from a third-party and giving to the company interviewing you.