SENDIAS is an independent advice service who are also available to speak with to share your concerns
The National Autistic Society website, the main UK charity for supporting people with ASD and their families (contains lots of useful advice and resources)
Advice and support, including booklets to help with independent toileting, sleeping and managing behaviour
A comprehensive site, with a useful resource library
A national charity offering information support and advice about parenting, including challenging behaviour, emotional wellbeing, teenagers etc. details about specialist advice, parenting groups in your area
https://www.familylives.org.uk
Young Minds is a national charity committed to improving the mental health of all children, advice about depression, eating disorders, and other mental health issues affecting children
https://youngminds.org.uk/find-help/for-parents