A full neurocognitive assessment can be done for about £800-£900. Not sure if ASF will fund as although it's assessment there is an educational element which is obviously not funded under ASF. However the assessment is done by a clinical psychologist and an educational psychologist so that might help. The assessment is done as part of assessment for FASD as well. It will tell you overall IQ and strengths and weaknesses in different domains. If you cannot get funding and you really think it will help might be worth doing a crowd funding exercise even if you only raise part of the money.
Mum to DS, Jealous Dog (13) and DS, Monkey Boy (11), married to Rundad