Children with special needs don't generally do well in integrated schools.
It makes all the trendy liberals feel good ('Gosh yes, little Chloe wears the overalls and hands out the goggles in Chemistry. She takes part in everything! The fact that she is sitting there flicking a piece of paper all lesson and staring out of the window is conveniently overlooked.)
Additionally the use of labels in SEN is so meaningless and arbitrary that there will never be any realistic allotment of children to purposeful education until it is sorted, so that is a whole different matter.
Boffin, I'm not sure why you expect TY to explain, interpret and account for issues with charter schools elsewhere in the world and their respective governments' decisions on funding. To draw an analogy, it is like asking me to draw up a service revies on Nurundi's provision for non verbal children with ADSD who require A/AC. 
I was in the States this summer and spent a lot of time with people who have children in charter schools. Needless to say, most of them are massively oversubscribed as indeed is the London Free. TY's articles in the Telegraph last Saturday gave the figures as well as those for teacher applications. He seems to modest to link/quote, so I hope he will now.
Doug Lemov runs a chain of very successful charter schools in the States and is a very inspiring man indeed.
I think you might find your energies better directed to home and considering such worrying factors as to why we are pouring taxpayers' money into unions.
Here's a helpful link.
Wonky, your embarrassing dismissal of 'quoting a dead language' with regard to Latin is a fine example of how access to a glittering treasure trove of knowledge has been denied to those who consider Latin the preserve of anachronisitic pedagogy.
I use my knowledge of Latin nearly every day of my life. It served and continues to serve me well in understanding words from unfamiliar languages and unencountered ones from those I do speak.