I might look into that Babyroobs, she's not statemented and doesn't require extra help at school beyond sitting on the "naughty" table in front of the teacher's desk, she is unable to stay focused on any task without direct supervision, I can't even leave her alone to dress herself if we are on a timescale, she is physically able to dress herself, but cannot focus and will start staring at the fire or singing instead of putting on her clothes.
She has poor impulse control and no sense of danger, even at 8 she has to hold hands by the road because she will think nothing of dashing into on coming traffic if she sees something exciting at the other side of the road.
She also struggles with anger/frustration and has hurt her sister a few times. She instantly regrets her actions but can't stop it happening again. It upsets her more than it does us, even when she broke dd1's nose, dd1 was more concerned with comforting her sister than she was with her own injury.
Unless this changes in the next four years I wouldn't trust her not to lose her key and decide to go wandering or not to cause damage in the house or to her sibling if she gets annoyed by something.
I've done all the parenting courses etc and followed the advise to a tee. She was diagnosed with ADHD and mild Aspergers about a year ago but it was decided she was not severe enough to need much intervention other than SALT and she had her own TA for a while but that was stopped this year.