@MyCatPrefersPeaches once the EHCP is finalised, I would appeal.
Despite what the LA has said, there is no guarantee they will agree to amend at a later date. You may end up needing to appeal, anyway. The NHS report is also likely to be less comprehensive than the independent report.
You don’t need to spend large sums appealing. Depending on your evidence, you may not need to spend anything else. If you could afford it, you could ask the SALT if they would write an addendum. If you can’t afford it and decide you need more up to date evidence, contact Parents in Need. There are other ways of securing evidence if you can’t afford it, but that is where I would start.
I would also relook at the draft. I know I say this all the time, but it is not uncommon for parents to believe the wording is better than it is. Highlight all DS’s special educational needs in one colour and then all the provision to meet the needs in another colour. Each need should have corresponding provision. Then go through the draft and make sure all the highlighted needs are in B and the highlighted provision is in F.
Make a note of anything the LA has omitted from the draft, any needs without corresponding provision, any woolly and vague wording, anything the reports have failed to include, and any reports the LA has failed to include.
When you go through F, look out for vague and woolly wording. For example, “access to”, “would benefit from”, “regular”, “up to”, “or equivalent”, “opportunities for/to”, “as appropriate”, “would be useful/helpful”, “such as”, “e.g.”, “etc.”, “as required”, “as advised”, “key adult(s)”, “staff”, “small group”, “frequent”, “could use”, “trained”, “experienced”… Provision must be detailed, specified and quantified. If it isn’t, it isn’t enforceable.
When (it is a matter of when, not if) you find vague and woolly wording, check the reports to see if they are woolly and vague or whether the LA has watered down provision. If the reports are vague and woolly, ask the LA to go back to the report writers to make the reports detailed, specified and quantified. If the LA has watered down provision, request the LA stick to the wording in the reports.
You don’t mention OT provision, this should also be in F. Maybe mental health support too
@Bearlionfalcon state Church schools can be named in EHCPs even if you aren't of that faith (or of any faith). Sometimes religion can be relevant to EHCPs, but not being of faith doesn’t prevent a school being named or change the rules for naming a non-wholly independent placement.
Talking to local parents can tell you a lot. You will hear good and bad about every school, but it should help you build a picture of how approachable the school is and their overall ethos. Speaking to school staff can help. Not just what they say, but how they say it and what they don’t say. Although not being approachable to parents of potential students doesn’t necessarily mean they aren’t supportive of SEN. As well as looking at their SEND policy/information report, also look at the curriculum policy and behaviour policies.
Thinking about what type of school will suit DC best - your list of schools includes some that feel very, very different to each other, e.g. APS and Fortismere. I know parents who are happy with SEN support at Parli, but it doesn’t suit all DC. I know some who are happy with Clapton girls and think their SEN department is nurturing.