In 2003 Chiltern Railways refurbished 55020 (121020) and painted it into this smart blue livery with silver banding. The work also included the fitting of secondary door locking, which made it exempt from the mass withdrawal of Mk 1 stock at the end of 2005. This work was done to release a Class 165 for refurbishment. On 14 July 2003, it is pictured passing North Lee with the 18:55 Princes Risborough to Aylesbury service. The single car unit was ideally suited to this short distance shuttle service.