with regards to the 2:2 from the ht, they stated that there standard are very high
This could be the perfect explanation. Assuming it's a Bucks or partner school, there will be an appendix to the appeal papers giving a breakdown of the head's recommendations/children qualifying. If the head has been rather strict, it could well work to your advantage!
'1' recommendations become somewhat devalued when it looks as if a headteacher has been markedly 'over-optimistic'!
Better to have a strict '2' than an over-optimistic '1'!
1 Brothers opp - we have a letter from the consultant and the doctors
2 Boy crying in the 2nd exam- the HT did state this and has been recorded- there is a one liner in the letter by the HT
3 The bullying has been noted by the school,
This is good, although ideally there would be some evidence relating to the actual effect
on your son. (Was his school work affected? Did the school notice anything unusual?)
Having said that, I think the evidence you have could well be sufficient for a score of 119.
Would it be worth getting a copy of my son's school records
I don't think so. This is something parents might need to resort to in situations where the school is refusing point blank to co-operate and to make information available.