Just putting this link here. These are really great free half-hour podcasts from two eating disorder specialists. Really supportive on how to speak to and help your child. And how to stay calm yourself in the face of it.
Start at number 1 which is linked here, as they do build on the skills from the first one. You can find them other places if this link doesn't work.Think its on spotify too.
Harriet Parsons and Jenny Langley (whose son had an ED).
anchor.fm/bodywhys/episodes/New-Maudsley-Carer-Skills-Podcast-Episode-1-Bringing-the-New-Maudsley-Carer-Skills-to-life---in-bite-size-pieces-e1kb4il