Arad Research, working in partnership with the National Centre for Language and Literacy based at the University of Reading, was commissioned to conduct a review of current practice in relation to early language development (ELD) interventions within Flying Start. The findings of this review of practice are intended to help shape guidance associated with the early language development entitlement of the Flying Start programme. Flying Start is a Welsh Government flagship programme targeted at families with children aged between nought and three living in some of the most disadvantaged communities in Wales. The methodology for the review involved a mixture of qualitative and quantitative methods. This mixed methods approach was chosen to enable data to be gathered from all local authorities whilst also collecting more detailed information and views in a smaller number of areas. The approach included desk research and analysis of information from all local authorities2, an electronic survey of all Flying Start teams, fieldwork with Flying Start staff and parents in selected local authorities and a group discussion with Speech and Language Therapists (SLTs). (author abstract)