According to my son's school, he may have PDD- NOS, snd next year he will be assessed by an Educational psychologist. The school thinks he may temporarily need one to one support. He is intelligent and is doing well in most of his work but gets confused by informal instructions and imaginative tasks.
If he does not need support when he is older (he is six now) would a mainstream independent school admit him? I do not think he would cope well with the informality of a state school.