SUMMARY: Measurements of foot inversion/eversion during gait are of particular interest in people using common peroneal Functional Electrical Stimulation (FES). In addition to addressing excessive equinus in swing, FES systems are commonly prescribed to improve stability at initial contact and/or forefoot clearance in swing, in the presence of excess inversion. To date, the direct effects of FES on foot movement in 3-D have not been published, as available 3-D clinical foot models such as the Oxford Foot Model (Stebbins et al. 2006) require additional markers to be applied to the foot in an accurate manner, preventing their use when footwear is donned.The aim of this project was to characterise gait kinematics with and without FES in 3-D for existing FES users at Sheffield Teaching Hospitals (STH) gait laboratory, using an in-house developed ‘shoe model’. In addition to the standard Vicon PlugIn Gait (PiG) marker set, this model required additional markers on the medial and lateral aspect of the distal first and fifth metatarsal heads respectively. It was preliminary validated through comparison of outputs from barefoot kinematic data processed with the Oxford Foot Model, from the normal database available at Sheffield Childrens Hospital (SCH) gait laboratory.