APA	American Psychological Association
ASD	Autism Spectrum Disorder
CYP	Children and young people
DFE	Department for Education
DSM	Diagnostic and Statistical manual of mental disorders
EHCP	Education, health and care plan
ICD	International classification of diseases
NHS	National Health Service
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
RCSLT	Royal College of Speech and Language Therapists
RTA	Reflexive thematic analysis
SAD	Social anxiety disorder
SALT	Speech and language therapist
SEN	Special educational needs
SENDCO	Special educational needs and disabilities coordinator
SM	Selective mutism
SMIRA	Selective mutism information and research association
UK	United Kingdom
YP	Young person