Hi Donnamarieo
Be prepared for the Tribunal.
Do not believe it is all friendly and you will be on an even footing the LA representatives, they know all the ropes, they have done this many times before, you will be your child's advocate.
Have you contacted the school yourself which you want your child to attend? Have you been told by the school they can not take your child? also have you looked at alternatives, so you can state why your child needs to go to the school of your choice? You will need to make a case.
You say your son has a statement for what it is worth, if you are also appealing on parts 2 (needs) and 3 (provision) as well as part 4 (placement) of the statement you need to have as much ammunition to fight your LA with as possible.
If you are fighting parts 2 and 3 you need a good understanding of the assessments used by the educational psychologist who carried out the assessment on your child. Google the tests, it takes time, but it is worth it for a clearer understanding of the tests.
Fighting for your childs needs is not an equal battle with the LA
Look up the psychometric conversion charts for yourself, again you will find them by googling, I found it helped to understand the scores and how the LA educational psychologist downplayed my childs needs.
Do you have a copy of Special Educational Needs Code of Practice? You need one, it is free of charge and can be ordered from DfES Publications. Tel 084560 222 60
Also look up on the internet
KENT EDUCATIONAL PSYCHOLOGY SERVICE TRIBUNALS. sendist - knowledge, issues and preparing for tribunal. This is their authority's procedure for their staff, to prepare for Tribunal, it useful to know how the other side prepare.
Good luck, and keep researching.