Okay, I've gone through all the replies here and on Tumblr.
90 people have confirmed that they've made a complaint or positive feedback submission about it, which is 62% of the way to 145. Only 55 more complaints to go!
Here's the link: https://www.bbc.co.uk/contact/complaints/make-a-complaint/#/Complaint Complain that there weren't enough trans characters, as we're trying to counter the 144 complaints about the presence of a trans woman in the episode.
(For your easy reference: "The Star Beast" aired on 25/11/2023, BBC One, and the trans character is called Rose.)
Reply when you've done it, so we can count us all. And please consider boosting the OP above!