Hi, this sounds like a strange question, but can a childs prematurity be taken into account at an appeal?
We had an appeal on grounds of prematurity. It was a case where the child was born in late July, but was due in September. They'd been allowed to join school a year 'late' to be with what should have been their cohort, but the parents were warned at that time that the secondary school may object - but who thinks of that in Reception. The school said that the child should have taken the 11+ exam the previous year, and was refusing to allow her to take it with the rest of her year.
Medical evidence was produced, as well as lots of other useful information. The child came to the appeal as well, which we found a little difficult when discussing maturity, etc.
We decided that as the child was so premmy (one picture showed her at 'drowned rat' stage - I've spent time in SCUBU's and always think that the very little ones look like half-drowned rats, unlike our normal size, if not larger full term +3 weeks one), it would be unfair to allow them not to take the exam with the rest of what should have been her year had she been full term, so allowed the appeal.
Our decision didn't take long on that occasion; I remember dashing out the door to have a word with the parents who hadn't quite made it down the stairs - our clerk didn't like us doing that, saying it had to be done by letter, but this was a one off appeal, out of the normal appeal season, and unlikely to be repeated.
If it were an 'ordinary' appeal then I would take it into account, but would want to see plenty of evidence, notes from the school, and even if you could find it (and I'm sure there must be research out there), something showing that premmies ability is x weeks behind a full term child, even at age 11.