1. Royal College of Speech & Language Therapists London UK
2. NHS Lothian Edinburgh UK
3. Child and Adolescent Mental Health Service Whittington Health NHS Trust London UK
4. School of Education, Communication and Language Sciences Newcastle University Newcastle UK
5. Department of Education University of Oxford Oxford UK
6. Centre for Childhood Deafness, Language and Learning Boys Town National Research Hospital Omaha NE USA
7. Service‐user Representative Edinburgh UK
8. School of Psychology and Clinical Language Sciences University of Reading Reading UK
9. School of Health and Social Care University of Essex Colchester UK
10. Moor House Research & Training Institute Moor House School & College Oxted UK
11. Language & Cognition University College London London UK
12. Division of Language and Communication Science School of Health Sciences City, University of London London UK