MindEd for Families (http://minded.e-lfh.org.uk/families/index.html ) have published a large number of easy read PDFs for people who are worried about their children’s wellbeing, mental health, or development, for example:
What if I am worried about my child’s mental health?
They provide many more easy read PDF files on a wide range of parenting topics under the heading “More Detailed Learning” on their website: http://minded.e-lfh.org.uk/families/index.html