Nan - am so sorry to hear of more difficulties - I hope the unit's response is helpful.
To those who have asked about discharge at 18 -here is what happened to us
In the run up to her 18th (i'd say about 6 months out) we had a lot more resources/interventions thrown at us.
We were pointy elbowed in saying that we would not accept a discharge at 18 and for DD to have to access adults as a 'new flyer' so to speak (at this point she would not have met the BMI threshold for adults yet her recovery was established enough so we feared discharge and go to the back of the queue)
CAMHS agreed that she could stay with them for 6 weeks past her 18th and the month prior to 18th and period afterwards would see a transition to adults. During this period she had a new therapist who achieved more in her few sessions with DD than the rest of her CAMHS time
At 6 weeks post 18, DD had met with adults caseworker but we had a curveball thrown insofar as caseworker was then off sick so contact paused. Then she had to start mat leave early so we transferred to another caseworker.
By this point, DD was of the mindset that her recovery would be hampered by being in ED services - she felt that everything around her telling her she had an ED would reinforce ED's power. She preferred a 'fake it till you make it' approach so she moved into Adults MH disorder rather than ED team with an open door approach.
Then (about 6 months later when DD felt she needed some support) it went pear shaped as the MH case worker told DD her weight in 5 mins of their first meeting - 😡
in positive news, she's in a much much better place now.