A lot of these 'statemented' kids cause merry hell in mainstream schools. There is one in both of my kid's classes and they are violent and generally anti-social plus very disruptive.
On top of that they have a dedicated carer as well, how much does thst cost the local authority?
My old fashioned, and socially unacceptable view is that they should all be in the same place.it would save money and it would not hold back the other kids.
Both of my boys moan like hell about them, they get special rewards and treatment and seem immune to any kind of punishment.
My Daughter is having similar issues at school, being regularly attacked by another girl in her class who has some sort of statement.
Apparently she lashes out because she is frustrated.
I played along until my daughter stopped eating her luch due to the other kid interfering with it (my daughter is a coeliac - the other kid was rubbing her bread on my daughters lunch) - this has nothing to do with special needs - it is just plain nasty and I think the other kid should have been excluded for it.
It appears a 'statement' can be a licence to create havoc and get away with it for a small minority of kids.