Home Education - Where to start

Okay

I think the time has come to remove youngest child from school.

He is almost 6 and has various problems including Unilateral Hearing
Loss, Asperger's Syndrome (high Functioning Autism), and Attention
Deficiency, as well as some physical needs. His present school are not
coping although they claim they are.

Where do I start, and what do I need.

I know I need to inform his head teacher and the LEA.

But what basic resources do I need.