I'm looking to find a list of alternative education establishments more suited to my daughter's needs. She has recently received a diagnosis of Autism, and even with support is very unhappy in mainstream school.
The simple answer is that there is not a list of alternative education establishments. Your local authority website should have details of all maintained schools in your area, mainstream and special schools and units. Some specialist units will be based in mainstream school. You may have done this already but we would suggest that you talk to the SENCo at your daughter’s school to see if adjustments can be made. There has been a growing demand for specialist provision for children diagnosed with Autistic spectrum disorders some schools now refer to themselves as serving children with complex needs. There are some independents schools such as those run by the National Autistic Society. In most cases your daughter would need an Education Health and Care Plan to be considered for specialist schools/provision.
You may find these links useful.