Hi everyone thanks so much for all your replies!
To try and answer a few of the questions we have tried the following:
I brought her a small double bed when she was 2 so that I could sleep on it as well in an attempt to keep her in her own bedroom rather than mine so that she was 'used to' her room. We have since moved and been in our current place 5 years - still with that bed but a new full size double coming this weekend!
I would sit with her until she fell asleep (pre melatonin) and would escape for an hour or 2 after sitting there for at least an hour and a half, but she'd always wake by the time I went to bed.
Since the melatonin I sit in the hallway but still can't get away completely.
I've done jobs before like ironing, folding washing etc and moving back and forth but ultimately she won't sleep until she knows I'm there and not moving about.
We've tried listening to Audible however she sees this as an activity and listens and don't sleep!
She would sit and draw/ colour but she would never actually stop and go to bed - she would be out to find me.
She's not allowed any tech for an hour before bed as per her tablets, so I make sure everything is off by 7pm, she has her tablets then a shower and she reads a book while I have a shower then we read together. Then I sit in the hallway 🙈🙈
I must say that last night was a particularly bad episode and she didn't sleep until I gave up at midnight ish and let her in my bed.
Usually she will sleep but I'm still stuck in the hallway for god knows how long.
On her last set of notes from the paediatrician (November) it mentions a sleep study at St Mary's or Evelina if no improvement. Her next appointment is early February so i am going to push for this.
I had a look at the scoring for Autism that someone sent and answered the questions. She scores 22 I believe 29 is the bench mark for diagnosis so possibly a mild form if that is a thing?
Things she has traits for is - clothing - just this morning changed her school T-shirt for another as it was 'itchy'.
Takes her at least 5mins sometimes 10 to put shoes on as she pulls them so bloody tight 🙈
Loves to draw but it's usually the same thing over and over
Likes to watch certain TV shows over and over too - I've managed to get her to watch something different over Xmas on iPlayer.
Bites her nails to death!
I noticed one trait was hair twiddling - I do this occasionally when bored lol!
Her dad tells me she don't play him up much at his - although there her younger sister sleeps in the same room and she can see him in the living room from the bedroom (very square shaped flat, whereas mine is long)
I have told her before I'll send her to his if she carries on and she's like nooooooo he will tell me off so bad - she's always responded better to men though. My brother has been round to babysit a few times (although not recent years ) and she doesn't play him up much.
I don't want to share a bed with her as she's 4ft 10ins and is like an octopus on cocaine - don't stop moving about all night - I've had arms crashed into my face more than once!
I want to make progress as we've been stuck like this since birth really - she'll be 10 in June and I can't believe 10 years later I'm still sitting in the hallway like a prisoner - something has to change!