Hannah is a qualified speech and language therapist with an academic background in linguistics. She is a part-time PhD student, whose research is focused on the use of naturalistic language sample analysis to support expressive language assessment by speech and language therapists. There have recently been significant changes in the terminology and diagnostic criteria for the unexplained difficulties faced by some children in acquiring their first language. Hannah’s research responds to these changes, with the aim of supporting clinicians to assess children’s expressive language in a way which is linguistically principled, has ecological validity and is feasible in busy clinical practice.