Dr Sean Pert is Consultant Speech and Language Therapist (SLT), researcher, trainer and Senior Clinical Lecturer at the University of Manchester. Since qualifying in 1995, he has specialised in Developmental Language Disorder (DLD) in bilingual children, completing a PhD on the lack of code-switching as a clinical marker of DLD. His publications include research papers, book chapters, clinical assessments in multiple languages and influential textbooks. Sean established the first website for SLTs in the UK, www.speechtherapy.co.uk.