The majority of appeals are successful. Not all have to appeal for a specialist school place but many do, especially for an independent SS. Is it a wholly independent school or a s41 school?
Start gathering your evidence if you haven’t already.
Make sure the LA sticks to the AR timescales.
In the meantime, if you want DS to attend full time, he can unless formally suspended. You don’t have to allow the school to get away with unlawfully, informally excluding DS. Don’t worry if the school does formally suspend. It will a) provide evidence of unmet needs to to help you pursue SS, b) force the school to follow due process, c) limit the number of days the school can suspend for, d) allow you to challenge any suspension, and e) ensure DS receives alternative education for longer suspensions.
As well as this, the LA is responsible for any provision detailed, specified and quantified in F. If there is anything detailed, specified and quantified in F that isn’t being provided, email the Director of Children’s Services reminding them of their duty under section 42 of the Children and Families Act 2014 and threatening judicial review if they do not comply. If this doesn’t work, you need a pre-action letter. Then, if that fails, JR proceedings will work.
Was DS 5 before or after the start of this term? If before, the LA is also responsible for ensuring DS receives a suitable full-time education. You can request this provision under section 19 of the Education Act 1996 from the LA. And take the same steps as in my previous paragraph if the LA refuses, delays or ignores you.