We moved back from Spain and it was the only time our LA was actually helpful. Ring the LA you are planning on moving to, speak to someone in their SEN department and ask for advice about schools, availability of places, transport and how they would deal with moving your daughter's statement and provision.
Every region varies, so it is also an opportunity to ask about additional support. For example, Suffolk has an organisation "Activities Unlimited" which gives out grants and organises lots of events, workshops and activities for children with additional needs.
Have a list of questions - it was only by prompting that I found out the information I really needed. Ask for their recommendations - you don't have to act on them but it might give you some insight.
Do you belong to your local NAS group? Try their Kent branch to get a feel for what is really available educationally, socially and health-wise.
If you can, visit the school/schools suggested. I was told I wouldn't get a place in one school locally but visited anyway - as it turned out, it wasn't what I was looking for but the visit was really helpful on focusing that.
Good luck. There is nothing like good family for support
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