From SENDIST guidance - I'm not trying to be negative, just to help, because this is not going to be a straightforward appeal because of the things you are and aren't allowed to appeal about within certain time limits. See bold writing in particular:
What you can appeal about?
You can appeal if the LA:
Will not carry out a statutory assessment of your child s special educational needs, following a request by you or by your child s school.
Refuses to make a statement of your child s special educational needs, after a statutory assessment.
Refuses to reassess your child s special educational needs if the LA has not made a new assessment for at least six months, following a request by you or by your child s school.
Decides not to maintain (decides to cancel) your child s statement.
Decides not to change the statement after reassessing your child.
Refuses to change the school named in your child s statement, if the statement is at least one year old (but you can only ask for a school that is funded by an LA). This is limited to the same type of school as the school named in the statement and it is not possible to ask us to alter Parts 2 or 3 (described below in more detail).
If the LA has made a statement, or has changed a previous statement, you
can appeal against any or all of:
The part which describes your child s special educational needs (part 2)
The part which sets out the special educational provision (help)
(part 3) that the LA thinks your child should receive.
The school or type of school named in part 4 of the statement.
The LA not naming a school in part 4.
Important please note that if you disagree with parts 2 or 3 of the statement, you will need to give reasons why and explain what changes you would like made.
If you disagree with either the school named or the type of school described in
part 4, then you will need to ensure that you tell us the name or the type of
school you want your child to attend. We will also need you to give reasons
why you think the school you have asked for is suitable for your child.
Making an Appeal
4
If you cannot name a particular school, we can take account of your wishes, if
you describe the type of school you want naming in part 4.
The LA does not have to name a school in part 4 of the statement if it is
satisfied that you are making suitable alternative arrangements for your child s
special education as set out in the statement. If, in that event, you are
unhappy that the LA has not named a school in part 4 then you will have to
explain why.
Are there any issues the Tribunal cannot deal with?
Yes, you cannot appeal to us if:
You are unhappy about the way the LA carried out the assessment,
or the length of time that it took.
You are unhappy about how the LA or the school is arranging to provide the help set out in your child s statement.
You are unhappy about the way the school is meeting your child s needs at School Action or School Action Plus.
You are unhappy about the description in parts 5 and 6 of the statement of your child s non-educational needs or how the LA plans
to meet those needs.
The LA will not amend the statement following an annual review.
The LA refused to name an independent school (which normally charges fees for a child s education), a non-maintained school (a special school that normally charges fees) or a different type of school (e.g. a special school when your child currently attends a mainstream school or the other way around) where you asked for a change to part 4 in a statement that was at least a year* old.
With regard to the last two bullet points, you would need to ask your LA to
reassess your child and appeal to us if they refused that reassessment or
if you remained dissatisfied at some later point in the process of amending
your child s statement.
IPSEA are going to be the best source of specifics though.