Thank you for your input Evil - always nice to have parent-professional perspectives too. I like the idea that every child is known and relationships are a focus. I hear what you say on consistency and continuity being easier with smaller populations. This is a major plus point. Do you have experience of teaching in larger schools too? How did that compare?
Gosh Sparkling - your past sit. sounds like ours now. He is currently at mainstream academy. Would feel that him being 'lost' in a larger school would be difficult for him. I would prefer more personal attention to help him get over his bullying hang-ups and help him come into himself.
LowClouds - Son is not overly concerned with having a larger amount of friends; so long as the ones he has, he is close to - he'd be happy. Like your DS - quality rather than quantity. The formation of cliques in larger schools is an interesting observation - do they do this to create their own smaller units so they feel safer?