This may have support from a speech and language therapist (SLT). The SEND Code of Practice:  0-25 - January 2015 (6.28 and 6.29) states that:

"Children and young people with speech, language and communication needs (SLCN) have difficulty in communicating with others. This may be because they have difficulty saying what they want to, understanding what is being said to them or they do not understand or use social rules of communication. The profile for every child with SLCN is different, and their needs may change over time. They may have difficulty with one, some or all of the different aspects of speech, language or social communication at different times of their lives.

Children and young people with [Autistic Spectrum Disorders] ASD, including Asperger’s Syndrome and Autism are likely to have particular difficulties with social interaction. They may also experience difficulties with language, communication and imagination, which can impact on how they relate to others."

The Speech and Language website is full of useful resources and information!

Speech & Language Therapy Services (Children) :: Midlands Partnership Foundation Trust (mpft.nhs.uk)

Speech and Language Therapy Toolkit | CPFT NHS Trust

Free Speech Therapy Tools - Worksheets and Printables (speechbuddy.com)