The primary output of the main cohort of typically developing children is the developmental percentile charts.~These will be then used to present the clinical longitudinal data against a normal backdrop of developmental changes in children.~This has multiple clinical applications in many of the children assessed by physiotherapy at GOSH and more widely Nationally and internationally
Walking measurement in children is important but there are challenges associated with obtaining reliable repeatable data in a clinical setting that is meaningful and easy to interpret. This study set out to develop a new way to collect, record, and interpret walking data that is suitable for the clinical environment. Developmental percentile charts were selected as they are widely recognised and easily interpreted.