Deborahf, i have some extra info. (I work for a LEA)
The LEA has fifteen school days in which to set the date for the appeal. In which case your son remains on roll of the excluding school, the school should provide work and mark it. It is during this time that no other ed. provision will be provided as he is on roll.
The actual appeal will be made up of 3 or 5 independent panel. the new legislation states that a head or ex head or teacher must be repesented on the panel. There will be a LEA rep at the meeting. Ensuring that the legislation has been followed interms of the exclusion process. You will be asked to submit your written evidence 5 days before the date so the panel can read it. The school cannot submit any NEW evidence but you are able to. So ensure you have any extra evidence available to submit.
Are you aware that if you win your appeal whilst you son can return to the school,the exclusion will be quashed he does not have to. However, if you chose not to return YOU are responsible for finding a new school place. What year is your son. if he is KS1 there is class size prejudice ie: max 30 AND as you said if all local schools are full it will be difficult.
If you are unsuccessful the LEA has an obligation to provide 25 hours/fulltime education provision and a new school place.
Kyliebump is right, check about support for re-tegration, most LEA's do have a budget and support team, who will adivse and support you through this process.
ACE are very good at advising and supporting, your LEA should also have an appeals helpline.
In terms of the statement was a school submission or did you request. Has your son seen an educational psychologist, was he on a pastoral support plan, an individual education plan, were their 'outside agencies' involved. Did he have fixed term exclusions? Many times submissions are turned down for lack of evidence. IPSEA will help you with this.
What did your son do to be permex?
I would also contact your LEA to ask what provision is made for primary excluded pupils as said above full time provision is a legal requirement but will not kick in till your son is 'off roll'. Most LEA's have pupil referral units in which to educate.
Sorry to be the bearer of bad news, but in my experience most appeals are not successfull. Do your research and by submitting paperwork, will help you to keep focussed and non emotive at such an emotional time. The new legislation is very clear that a school MUST explore all avenues to support a child before resorting to a permanent exclusion. That, should be your argument.
The difficulties is, that even though the school has not met your son's needs, they may have followed the exclusion process accurately.
Sorry for the long post.
I hope that helps