Research question: The primary aim of this study is to compare the prevalence of motor impairment from birth to five years of age between children born <30 weeks and term-born controls, and to determine whether persistent abnormal motor assessments in the newborn period in those born <30 weeks predict abnormal motor functioning at age five years. Secondary aims for both children born<30 weeks and term children are i) to determine whether novel early magnetic resonance imaging (MRI) - based structural or functional biomarkers are detectable in the neonatal period that can predict motor impairments at five years, ii) to investigate the association between motor impairments and concurrent deficits in body structure and function at five years of age, and iii) to explore how motor impairments at five years, including abnormalities of gait, postural control and strength, are associated with concurrent functional outcomes including physical activity, cognitive and learning ability, behavioural and emotional problems.