for his bucks he scored 118 and then they took a nose dive in the order they were sat after that .for the consortium with 109 and 108 for SG
It's not really possible to compare Bucks with the consortium & SG - they have different test formats, and the standardisation would not be the same.
who knows he was doing so well in all the tests ... just wondered if I should mention briefly and then concentrate on school achievements or if I should mention and have it confirmed by the teacher too, or will that just seem like im making excuses
Is it enough just to put forward all the good academic points and leave it at that ?!?
It might be best to get something in writing from the school, but I suggest you don't say too much about this at the appeal, unless they ask you questions. I don't think it will carry much weight, unless the school will confirm his work was affected (and it sounds as if they think he's doing well and still on target for level 5s).
On the other hand, he was close to a qualifying score, so you probably don't need much in the way of extenuating circumstances.