Keolis to operate the DLR system till April 2021 July 4, 2014 | Europe News Transport for London (TfL) has announced that France-based Keolis will operate the Docklands Light Railway (DLR) System in London, from December 2014 to April 2021. During this period, the ... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password