I did an appeal for my second daughter all by myself........ and won it!
If your child has two parents... both of you go-- its a good idea to show a united front.
There will be probably three people to decide the case and their legal advisor (s ) plus the school, putting its case ( usually on the grounds of health and safety overpopulation of the school etc ) why they dont wish your child to attend.
You just have to make your own case out. I'd made a dossier about 40 pages long of reasons my daughter NEEDED to be at this school with supporting evidence from various sources.
When we did it... I did all the talking, my ex-husband just sat there, looking helluva relaxed not sure how he did it, but i did all the serious work and then he had the judges smiling and laughing at the end with some lil story about our child.
Was crazy... an interesting experience, not one I'd wish to repeat again!
Good luck xxx