Well, the BBC is mainstream, but I know what you mean. It would be nice to see it in the guardian and also the main page of the BBC website, not just tucked away in the Scotland north section.
I do note that in this article they have dropped the "she" and so not use any pronouns to describe "Heather" but also have not indicated either way what sex "Heather" is. Usually they will say trans woman or something, but it's not mentioned. I can't decide if this is progress or not! Most of the Scottish press is saying it clearly.