Mutton Hope your ds settled in quickly and is happy at his new school.
Raising personally, I would contact his tutor and/or the lead for pastoral care in his year. There's lots they can do, including setting up a buddy and introducing him to lunchtime clubs where there are pupils with similar interests. The tutor can definitely move him onto a table with the other boys, that would be a good start.
We've had a rocky morning here. Ds left home at the usual time. I waved him off, but something made me go and look out of the upstairs window to watch him go down the part of the road you can't see from the front door. I actually wondered if he was running to meet his friends, as he's still anxious about being late and them not waiting etc, even though he's usually first there.
I saw him walk to the first road he has to cross, disappear behind the hedge, then there was a pause and I saw him limping back. He was in terrible pain with his ankle and also heel pain, which is relatively new - he developed it last term, but has been ok so far this year, even with walking a lot further.
Brought him in, text his friends to go without him and gave him pain relief. Then he pointed out he has PE before lunch, so had to type him a quick note for the teacher and luckily his dad was still here, so drove him up to school. So cross with dh, who implied it was all because ds didn't want to do PE. He doesn't like PE, but that's because he's scared of the teacher and as I pointed out, it's far scarier to have to approach the teacher and ask to be excused, than it is to keep your head down and do PE. 
I've just been onto the school, again, as they still haven't set up his care plan, which means he has no pain relief in school, should he need a top up this afternoon. Yet again the person I need to speak to is busy and will call me back. Grr! Problem is, the person in charge of care plans is also head of admissions, so will be busy with open days and visits for next year's intake.
I'm going to book ds a GP appointment. Not sure what they can/will do, as he's already had a, frankly hopeless, course of physio and been seen by the Lead OT. I'm thinking he may need orthotics though, for what good it will do. I had my first lot of orthotics at his age and was told it was probably too late for them to do much good.
To cap it all, there's no-one around who can pick him up this afternoon, so he's going to have to walk home, no matter how bad he feels. 
So cross with DH, ds needs to know that we support him and won't accuse him of malingering, he really doesn't do that. Unlike myself, dh has never had chronic pain to deal with though and while he does try, he really can't understand what it's like.