Sample Size We aim to recruit 15 people per group. An audit of CDC records suggests that there are between 5-6 eligible participants over a 12 month recruitment period. With 8 main recruitment centres this would result in 40-48 potential participants and a required recruitment rate of 75-63%. An on-going study looking at walking in children with older children with CP at Plymouth University suggests that this recruitment rate is feasible. Determining the actual recruitment rate in this particular patient population and the feasibility of using multiple centres across one region is one objective of the pilot study.