Is the school wholly independent or not?
If it is you need an offer of a place. It can’t be named without an offer.
If your preference isn’t wholly independent the LA must name it unless the LA can prove:
-The setting is unsuitable for the age, ability, aptitude or special educational needs (“SEN”) of the child or young person; or
-The attendance of the child or young person would be incompatible with the provision of efficient education for others; or
-The attendance of the child or young person would be incompatible with the efficient use of resources.
Being full is not defined in law, and on its own being ‘full’ is not enough of a reason to refuse to name your preference. The LA has to prove the school is so full admitting DS is incompatible. The bar is higher than many LAs admit. It is more than an “adverse effect”, “impact on” or “prejudicial to”. The LA can, and must, name the school regardless of the school’s objections unless the LA can prove one of the reasons above. Unfortunately, LAs sometimes refuse and force parents to appeal, but the majority of appeals are upheld.
Waiting lists don’t, or shouldn’t, exist in the same way as they do for admissions without an EHCP via the normal admissions procedures.
If the school is named in the EHCP they must admit. If they refuse Judicial Review is possible.