It was not until late 1979 that Sinclair returned to electric vehicle development. Around Christmas that year, he approached Tony Wood Rogers, an ex-Radionics employee, to carry out consultancy work on "a preliminary investigation into a personal electric vehicle".[13] The brief was to assess the options for producing a one-person vehicle which would be a replacement for a moped and would have a maximum speed of 30 miles per hour (48 km/h). Although Wood Rogers was initially reluctant, he was intrigued by the idea of an electric vehicle and agreed to help Sinclair.[14] The vehicle was dubbed the C1 (the C standing for Clive).