Parentlink - special Educational Needs and Disability Helpline
Information, advice & support for parents and carers of children with special educational needs (SEN).
British Dyslexia Association's website
Link to the parents & carers section on the British Dyslexia Association's website
Family Information Service - All the information families need
Information and advice about all Children’s Services including registered child care (from crèches to out of school clubs), nurseries, health information, leisure, support for children with additional needs, and much more. This confidential service is free to all parents and carers.
East Sussex ASD Parent Information Pack – Support Groups and Services
Here's a document listing Support Groups & Services on the East Sussex County Council's website
A good parent information website, here's it's page for parent toddler groups.
For Parents By Parents
This directory page from ForParentsByParents seems quite good.