I had a few standoffs with my dd in the early days, and me and my dh would tag team because it was so intense. I would say to dd that while I completely got how terrified she was feeling, that there is NO WAY to recover without eating. Food is medicine. There is literally no alternative way.
She really hated me saying that if she had cancer and hated the treatment, I would be doing the same thing and making sure she got it.
And no matter how unpleasant she would be to me, I would NEVER give up.
I'd try and get her to remember 'before', to try and get her to get some kind of sense of recovery being possible (that didn't work but I hope a tiny seed landed). I would tell her that she was ill, and she had an eating disorder, which meant she wasn't able to make decisions about whether to eat or not. And so we wouldn't be giving her an option.
Now, these are only things I said - I'm not naive enough to think there was something special about what we did. And it sounds like you're doing this, so if you can't make her eat then I'd put into place a boundary of a&e.
When is your first appointment with the team?